study

Autologous serum study in Marseille

47 patients using autologous serum for graft-v-host disease, Sjogrens Syndrome or severe dry eye. High satisfaction rate and no infectious complications.

J Fr Ophtalmol. 2018 Mar 27. pii: S0181-5512(18)30088-3. doi: 10.1016/j.jfo.2017.11.008. [Epub ahead of print]

[Autologous serum tears: Long-term treatment in dry eye syndrome].
[Article in French]

Beylerian M1, Lazaro M2, Magalon J3, Veran J3, Darque A2, Grimaud F2, Stolowy N4, Beylerian H5, Sabatier F3, Hoffart L4.

Abstract
INTRODUCTION:
Dry eye disease is a multifactorial pathology of the ocular surface. The high incidence of this pathology, as well as its significant impact on quality of life and vision and its financial cost, makes it a real public health problem. While the treatment of mild cases is generally simple and effective, treatment of severe forms is often disappointing. The use of autologous serum tears (AST) represents a therapeutic alternative for the most severe cases. The purpose of our study is to evaluate the efficacy of long-term AST treatment in patients with severe dry eye disease refractory to conventional treatment or secondary to systemic diseases such as Sjögren's syndrome or Graft versus Host disease (GVH), or ocular pathologies such as neurotrophic keratitis, chemical burns and ocular cicatricial pemphigoid.

PATIENTS AND METHODS:
This is a monocentric retrospective observational study conducted on 47 patients, with 83 eyes treated with autologous serum eye drops for isolated or secondary dry eye disease at the Marseille Public Hospitals between April 2014 and April 2017. The patients' subjective symptoms (ocular surface disease index [OSDI] score), their degree of satisfaction and the side effects were collected using questionnaires. Tear Break Up Time (BUT) and Schirmer scores were noted. A clinical evaluation based on fluorescein staining (Oxford score) was carried out prior to treatment with AST at P0 followed by 5 periods: P1 (between 1 and 3 months), P2 (3 to 9 months), P3 (9 to 15 months), P4 (15 months to 24 months), and P5 (>24 months).

RESULTS:
Out of the 83 eyes treated, the mean age was 54.39±21.56. There were 20 males (42.55 %) and 27 females (57.44 %); treatment indications consisted mainly of 25.53 % GVH, 21.27 % severe dry eye disease and 19.14 % Sjögren syndrome. The mean duration of follow-up was 9.82 months±15.50. The OSDI score decreased by 19.32 points±29.37 (P<0.05) between P0 and P1 and by 23.06 points±18.41 (P<0.05) between P0 and P4. The Oxford clinical score showed a significant decrease by the third month of treatment, between P0 and P2, by 1.32 points±1.76 (P<0.05). The Schirmer test and the BUT also showed an improvement in dry eye symptoms over time with AST, significantly at P1 (P<0.05).

DISCUSSION:
Complementary biological analyzes on the composition of AST are under way in order to identify predictive factors of effectiveness; patients not responding to AST treatment might respond to allogeneic serum from healthy donor cord blood.

CONCLUSION:
On this first series of 83 eyes treated with ASD, clinical efficacy was noted in most of the patients. No infectious complications were reported, and the satisfaction rate was very high.

Junior high meibomian glands and tears....

Not a lot of context here... can't wait to see the full study. But the general idea, of course, that it seems to be all downhill from infancy, as far as the tear system goes. 

Cornea. 2017 Aug;36(8):922-926. doi: 10.1097/ICO.0000000000001252.

Morphology and Function of Meibomian Glands and Other Tear Film Parameters in Junior High School Students.

Mizoguchi T1, Arita R, Fukuoka S, Morishige N.

Abstract
PURPOSE:
We measured tear film parameters, including the morphology and function of meibomian glands, in junior high school students at 15 years of age.

METHODS:
A total of 111 eyes of 111 students (56 males and 55 females) were enrolled in the study. The ocular symptom score (0-14), after-school study time, lipid layer thickness (LLT) of the tear film, partial blink rate, lid margin abnormalities (0-4), tear film breakup time, corneal and conjunctival epithelial damage (fluorescein staining score, 0-9), meiboscore as determined by noncontact meibography (0-6), Schirmer test value, and meibum grade (0-3) were determined. The relationships between parameters were evaluated with the Spearman correlation coefficient (ρ).

RESULTS:
The meiboscore was 2.8 ± 1.2, and the meibum grade was 1.8 ± 1.2. The meiboscore significantly correlated with the meibum grade (ρ = 0.272, P = 0.004), Schirmer test value (ρ = -0.220, P = 0.021), and LLT (ρ = -0.264, P = 0.005). The breakup time significantly correlated with LLT (ρ = 0.261, P = 0.006), meibum grade (ρ = -0.338, P < 0.001), and fluorescein staining score (ρ = -0.214, P = 0.025). The partial blink rate significantly correlated with the Schirmer test value (ρ = -0.240, P = 0.011). The meiboscore (P < 0.001) and meibum grade (P = 0.032) were significantly greater in males than in females.

CONCLUSIONS:
The morphology and function of meibomian glands are altered even at 15 years of age, with the changes being more prominent in males than in females.

Umbilical cord blood serum drops

Variation on the theme of autologous serum (see glossary if interested in more background). Here's some earlier ones cord serum:  one from 2006, one from 2011 and one from 2014..

Cornea. 2017 Aug;36(8):915-921. doi: 10.1097/ICO.0000000000001257.

Efficacy of 2-Month Treatment With Cord Blood Serum Eye Drops in Ocular Surface Disease: An In Vivo Confocal Microscopy Study.

Giannaccare G1, Buzzi M, Fresina M, Velati C, Versura P.

Abstract

PURPOSE:
To investigate the morphological changes of corneal epithelium and subbasal nerves by in vivo confocal microscopy in patients with ocular surface disease (OSD) treated with cord blood serum (CBS) eye drops.

METHODS:
Twenty patients with OSD (mean age 61.1 ± 12.6 years) were included in this prospective 1-arm study and treated with CBS eye drops for 2 months. Corneal sensitivity, Schirmer test score, breakup time, subjective symptoms [Ocular Surface Disease Index (OSDI) and Visual Analogue Scale (VAS)], and corneal staining were evaluated before (T0) and after (T1) treatment. In vivo confocal microscopy analyzed giant epithelial cells, subbasal nerve number and tortuosity, neuromas, beading, and dendritic cells (DCs) in the central cornea.

RESULTS:
OSDI, Visual Analogue Scale, and Oxford grading values significantly decreased at T1 versus T0 (respectively, 44.1 ± 18.9 vs. 74.2 ± 13.9; 3.7 ± 1.5 vs. 8.9 ± 0.9; and 2.4 ± 1.1 vs. 3.3 ± 1.3; P < 0.0001), whereas corneal sensitivity, Schirmer test score, and breakup time significantly increased (respectively, 49.5 ± 2.6 vs. 47.9 ± 2.9; 3.2 ± 2.0 vs. 2.4 ± 2.2; 4.6 ± 3.1 vs. 3.8 ± 2.1; P < 0.0001). Corneal nerve morphology improved at T1 versus T0 with a higher total nerve number (3.4 ± 1.6 vs. 2.5 ± 1.6 per frame) and lower tortuosity (3.0 ± 0.7 vs. 3.5 ± 0.6) (P < 0.01). The number of patients presenting with giant epithelial cells, beading, and neuromas decreased at T1. DC density did not change after treatment. The detection of neuromas and higher DC density at T0 were associated with greater OSDI reduction at T1 (P < 0.001).

CONCLUSIONS:
CBS eye drops significantly improved corneal nerve morphology and subjective symptoms in patients with severe OSD. The presence of neuromas and higher dendritic cell density at baseline were associated with greater reduction of discomfort symptoms after treatment.

Delivering cyclosporine A with contact lenses

Contrary to the abstract title, there's nothing actually new about this (this review mentions some earlier papers about cyclosporine delivered in contacts), but it seems like it's been quite awhile since I've seen something new specifically on this approach. This particular abstract says absolutely nothing whatsoever about safety or adverse events. 

Vestn Oftalmol. 2017;133(2):75-81. doi: 10.17116/oftalma2017133275-81.

[New approaches to the treatment of keratoconjunctivitis sicca].

[Article in Russian; Abstract available in Russian from the publisher]
Safonova TN1, Gladkova OV1, Novikov IA1, Boev VI1, Fedorov AA1.
Research Institute of Eye Disease, 11 A, B, Rossolimo St., Moscow, Russian Federation, 119021..

Abstract in English, Russian

A new method has been developed for the treatment of severe forms of keratoconjunctivitis sicca (KCS) that involves the use of an original cyclosporine A (CyA) saturated soft contact lens (SCL) together with preservative-free artificial tears therapy.

A new method has been developed for the treatment of severe forms of keratoconjunctivitis sicca (KCS) that involves the use of an original cyclosporine A (CyA) saturated soft contact lens (SCL) together with preservative-free artificial tears therapy.

AIM:

to evaluate the effectiveness of the newly developed treatment for KCS based on the use of medical SCL saturated with 0.05% CyA.

MATERIAL AND METHODS:

The patients (43 men, 60 eyes) with severe KCS were divided into 2 groups. Group 1 included 21 patients (30 eyes), who received artificial tears and wore 0.05% CyA-saturated silicone-hydrogel SCLs. Group 2 included 22 patients (30 eyes), who wore unsaturated original SCLs and received CyA instillations 2 times daily and, also, artificial tears. Apart from a standard ophthalmic examination, the assessment included Schirmer's test, Norn's test, vital eye stain tests, tear osmometry, laser confocal tomography of the cornea, optical coherence tomography of the anterior segment with meniscometry, impression cytology of the conjunctiva, tear pH measurement, plating of the content of the conjunctival cavity, measurement of the width of the palpebral fissure, and calculation of the ocular surface disease index. Treatment results were followed up at 1, 3, 6, and 12 months.

RESULTS:

The use of 0.05% CyA-saturated SCLs allows to halve treatment time for patients with severe KSC (down to 1 week - 1 month) as compared to unsaturated original SCLs in combination with 0.05% CyA instillations and to reduce it 5 times as compared to 0.05% CyA instillations only.

CONCLUSION:

The new method of KSC treatment that involves the use of medical SCL of original design (ensures even distribution of 0.05% CyA across the ocular surface) and preservative-free artificial tears has demonstrated high therapeutic effectiveness as compared to existing methods.

EyePrintPRO therapeutic scleral lens

This is the first paper I remember seeing about EyePrintPRO in an ophthalmology journal! So excited. I know some great things have been presented at meetings, but it's nice to see something on a PubMed search now.

EyePrintPRO is an amazing technology, where lenses can be created from a physical mold of the eye surface. I've been fortunate enough to be wearing EPP lenses for about four years now myself, and I feel awfully spoiled. Not everyone, of course, needs the highest technology lenses, and there's a high price on technologies like these, but their existence is a godsend for those who need them, particularly those who have special fitting difficulties that just can't be solved with more conventionally designed lenses.

This abstract is only on ten patients, but there are many people being fitted now all over the country. Mine were fitted by Roya Habibi in Seattle. I enjoyed reading the list of indications that the ten patients in the study had for the lenses:

  • LSCD (limbal stem cell deficiency)

  • PRK (the laser refractive surgery without the flap) decentred ablation

  • pellucid marginal degeneration

  • Stevens-Johnson syndrome

  • keratoconus

  • dry eye

  • neurotrophic keratitis, exposure keratitis from facial nerve paralysis

  • RK (radial keratotomy, the thing they used to do before PRK and LASIK)

I feel like I'm in good company with the PRK and RK patients. I have central islands (which everyone always assumes came from an old broadband excimer laser... only, they didn't... it was a VISX Star S3, which was pretty hot stuff back in 2001) and off-the-charts spherical aberration plus a fair amount of pain. I get good vision and comfortable days with the right lenses, but the only lenses I've ever been able to successfully wear long term have been PROSE and EyePrintPro.

The inventor of EPP lenses, Dr Christine Sindt from U of Iowa, is one of those wonderful eye doctors who combine being an extraordinary scientific leader in their field with heart-warming kindness towards patients. We've had the good fortune to have her input now and then in our FB scleral lens group

Can J Ophthalmol. 2018 Feb;53(1):66-70. doi: 10.1016/j.jcjo.2017.07.026. Epub 2017 Sep 28.

EyePrintPRO therapeutic scleral contact lens: indications and outcomes.

Nguyen MTB1, Thakrar V2, Chan CC3.

Author information

Abstract

OBJECTIVE:

To describe indications and outcomes of patients fitted with the EyePrintPRO therapeutic scleral lens.

METHODS:

A database search of patients fitted with the EyePrintPRO from 2014 to 2016. Fourteen eyes of 10 patients were reviewed retrospectively. Patient demographics, medical and ocular history, indications for fitting, duration of wear, symptoms, and best-corrected visual acuity (BCVA) were analyzed.

RESULTS:

Mean age at lens fitting was 49 years (range, 21-67 years). The average duration of wear was 12 months (range, 7-17 months). Indications for fitting included limbal stem cell deficiency, post-photorefractive keratectomy (PRK) decentred ablation, pellucid marginal degeneration, Stevens-Johnson syndrome, keratoconus, dry eye, neurotrophic keratitis, exposure keratitis from facial nerve paralysis, and post-radial keratotomy (RK) symptoms. Mean BCVA was 20/36 (range, 20/20-20/200). After the fitting, mean BCVA was 20/21 (range 20/10-20/60, p = 0.001). Nine patients reported resolution of their blurry vision, and all reported improvement of dry eye, eye redness, and pain symptoms. Six of 7 previous lens wearers reported significantly greater comfort with EyePrintPRO wear and the ability to wear the lens throughout the day; only 2 experienced fogging and needed to clean the lens after 4-6 hours of wear.

CONCLUSIONS:

A variety of indications for the EyePrintPRO scleral lens exist, and patients experience resolution of major symptoms. The ophthalmologist should be aware that therapeutic scleral lenses, including the EyePrintPRO, exist for patients for whom there is no surgical intervention or who want to delay or obviate the need for surgery.

Copyright © 2018 Canadian Ophthalmological Society. Published by Elsevier Inc. All rights reserved.

p.s. Just after I posted this, I saw the March 2018 newsletter from Scleral Lens Monthly - on the exact same topic! Great reading. 

Risk factors for persistent dry eye after cataract surgery

Who is most likely to get dry eye after cataract surgery?

In this study, they looked at patients who underwent cataract surgery. If their OSDI scores were greater than 12 three months after surgery, they deemed them as having persistent dry eye symptoms.  The point of the study was to analyze what was different about those patients at the time of surgery and soon after: is it possible to predict who will have persistent dry eye after cataract surgery?

One-third (31 of 96) of the patients had persistent dry eye symptoms after cataract surgery. Ouch!

Risk factors were determined to be:

  • High OSDI scores before surgery

  • Low TBUT 1 month after surgery

  • Low MG orifice obstruction score

  • Increased MG dropout

In other words, if they were symptomatic before cataract surgery, and/or if they had meibomian gland issues. 

Eye doctors need to be screening cataract patients for dry eye, advising them on risks and advising them on treatments for dry eye prior to cataract surgery.

Perioperative Ocular Parameters Associated With Persistent Dry Eye Symptoms After Cataract Surgery.

Cornea. 2018 Mar 14. doi: 10.1097/ICO.0000000000001572. [Epub ahead of print]

Choi YJ1, Park SY, Jun I, Choi M, Seo KY, Kim EK, Kim TI.

Abstract

PURPOSE:

To evaluate perioperative dry eye (DE) syndrome and meibomian gland dysfunction (MGD) parameters associated with persistent DE symptoms after cataract surgery.

METHODS:

We enrolled patients who underwent uncomplicated cataract surgery without previous ocular comorbidities and previous use of ophthalmic treatment except for artificial tears at a single tertiary hospital. Lipid layer thickness, meibomian gland (MG) dropout, tear breakup time, Oxford staining score, lid margin abnormality, meibum quality, meibum expressibility, MG orifice obstruction, MGD stage, Ocular Surface Disease Index (OSDI), and Schirmer test score were prospectively assessed in order at baseline and 1 and 3 months postoperative. Patients with an OSDI score &gt;12 at 3 months postoperative were defined as patients with persistent DE symptoms after cataract surgery. Multivariate logistic regression was then used to determine risk factors for persistent DE symptoms.

RESULTS:

A total of 116 eyes of 116 patients were enrolled, and 96 patients completed all examinations until 3 months postoperative. Thirty-one patients had persistent DE symptoms at 3 months postoperative. The Oxford staining score, lid margin abnormality, meibum quality, and MGD stage were improved over time. Baseline high OSDI scores [odds ratio (OR), 1.072; P = 0.001] and 1 month postoperative low tear breakup time, low MG orifice obstruction scores, and increased MG dropout (OR, 0.322; P &lt; 0.001, OR, 0.291; P = 0.015, OR, 1.145; P = 0.007, respectively) were determined as risk factors for persistent DE symptoms after cataract surgery.

CONCLUSIONS:

Ocular parameters at baseline and at 1 month postoperative were important in predicting persistent DE symptoms after cataract surgery.

High success rates for scleral lenses in graft-v-host-disease patients

These numbers are unsurprising to anyone who knows people with severe chronic GvHD (when they develop severe dry eye, among other things, following a bone marrow transplant for example), but nonetheless impressive:

  • 97% of patients had improvement in quality of life

  • 92% of patients continued to use sclerals (mean follow-up time was more than 1.5 years)

  • Corneal damage, vision and quality of life were all assessed 2 months after starting and all improved

Bone Marrow Transplant. 2017 Jun;52(6):878-882. doi: 10.1038/bmt.2017.9. Epub 2017 Feb 20.Scleral lenses for severe chronic GvHD-related keratoconjunctivitis sicca: a retrospective study by the SFGM-TC.Magro L1,2, Gauthier J1,2, Richet M3, Robin M4, Nguyen S5, Suarez F6, Dalle JH7, Fagot T8, Huynh A9, Rubio MT10, Oumadely R11, Vigouroux S8, Milpied N8, Delcampe A12, Yakoub-Agha I1,2,13.Author informationAbstractChronic GvHD-related keratoconjunctivitis sicca (cGvHD-related KCS) can significantly alter the quality of life of patients after allogeneic hematopoietic stem cell transplantation. The aim of this work was to assess the efficacy and tolerability of scleral lenses to treat severe cGvHD-related KCS. In this retrospective, multicenter study, we included 60 consecutive patients diagnosed with cGvHD-related KCS and fitted with scleral lenses. Patients were evaluated at baseline and at 2 months with the following tests: the Ocular Surface Disease Index (OSDI) to assess quality of life, the Oxford score to grade corneal damage and the logarithm of minimal angle of resolution (Log MAR) scale to determine visual acuity. We observed improvement in quality of life in 58 patients (97%). All parameters improved at 2 months. We observed significant differences at 2 months compared with baseline for the mean OSDI (86 versus 30, respectively, P<0.001), the mean Oxford score (3.2 versus 1.3, respectively, P<0.001) as well as visual acuity (Log MAR of 0.33 versus 0.10, respectively, P<0.001). Treatment with scleral lenses was discontinued in only 5 patients (8%) with a median follow-up of 20.5 months (range: 2-125 months). Scleral lenses were very efficient and well tolerated in patients with severe cGvHD-related KCS.

Case reports of Cacicol use in Sjogrens patients with superficial ulcerative keratitis

Interesting case report on some folks with severe corneal disease. They clearly had to stay on it to get any kind of continued benefits, but those benefits sound pretty dramatic:

  • decreased pain, burning, irritation and FBS

  • improved vision

  • healing of diffuse keratitis (after several months treatment)

Medicine (Baltimore). 2018 Mar;97(10):e9935.
Evaluation of a new matrix regenerating agent in patients with Sjögren syndrome and superficial ulcerative keratitis resistant to conventional therapy: A report of 3 cases.
Fajnkuchen F1,2, Barritault D3, Giocanti-Aurégan A1,4.

Abstract
RATIONALE:
Sjögren syndrome (SS) is frequently associated with ulcerative keratitis, which is difficult to treat due to lacrimal tear deficiency and inflammation of the ocular surface.

PATIENT CONCERNS:
We report the successful additive effect of a matrix regenerating agent (RGTA, Cacicol) in SS patients with severe superficial ulcerative keratitis resistant to conventional therapy.

DIAGNOSES:
Retrospective, noncomparative case series of patients with primary or secondary SS associated with chronic diffuse keratitis.

INTERVENTIONS:
All patients (3 women, aged 46, 59, and 84 years) had several years of dry-eye disease history and recurrent keratitis despite having used maximal dose topical therapies including artificial tear substitutes, topical vitamin A, and cyclosporine 0.05% emulsion. All patients suffered from dry, diffuse, and chronic superficial keratitis of at least 75% of the corneal surface, with no sign of corneal neovascularization or opacity.

OUTCOMES:
RGTA treatment led to a rapid and marked decrease of ocular pain, burning, irritation, foreign body sensation, and improvement of visual acuity. Total diffuse keratitis healing occurred after several months of treatment. Discontinuation of RGTA administration led to the recurrence of severe keratitis; re-introduction of RGTA was successful. No local or systemic adverse effects related to treatment were reported.

LESSONS:
RGTA treatment was effective and safe in this small series of 3 patients suffering from SS associated with recurrent or chronic superficial ulcerative keratitis resistant to conventional therapy.

Glaucoma drop study - another nail in the BAK coffin... right?

I enjoyed reading this study titled "Exploring topical anti-glaucoma medication effects on the ocular surface in the context of the current understanding of dry eye" (scroll down for the abstract)

On the face of it, it is all about glaucoma drops and dry eye. But don't be fooled by the absence of the word "preservative" in the text of the abstract. I checked with the authors to verify a few details because the complete text had not yet been released. As suspected, the paper is really mostly about the known and despised toxic effects of the preservative benzalkonium chloride (BAK), also known as dry eye inducing poison for your eyes.

There is a plethora of literature on the toxic effects of BAK to the cornea. Much of the attention has been given to BAK in the context of glaucoma medication. This is presumably because glaucoma patients (1) have to take drops every day for years, which means long term exposure to the risks, and (2) are older, which means they are already at higher risk, even without additional risk factors common in their age group, such as cataract surgery and the many health conditions requiring medications that are known to be drying to the eyes. Why would we put people to this kind of long term completely avoidable risk? On the other hand, there's probably a much simpler reason for the proportionally high attention to glaucoma drops: (3) glaucoma patients are relatively easy to study as there's so many of them, and they have to take the drops. Bit of a captive audience.

In relatively recent years, preservative free glaucoma medications began seeping onto the market and - much too slowly - began displacing the preserved ones. I remember the first PF glaucoma drop - Travatan Z - and how long it took before I ever heard from dry eye patients whose doctors prescribed it without specifically being asked to by the patient. (You'd think the glaucoma doctors and the cornea doctors might at least occasionally chat over a water cooler?) Thankfully, things are much better now than they were. - That is, specifically in the world of glaucoma medications, and specifically in the US. (Dr Craig mentioned that no preservative free publicly funded options are available yet in New Zealand.)

One of the areas I continue to be very, very concerned about when it comes to dry eye and corneal damage from BAK overexposure is in over-the-counter eyedrops in the US. Drugstore shelves are crammed with all kinds of BAK preserved drops, ranging from lubricants to antihistamines to vasoconstrictors - plus, my most hated crowd: the combo multi-purpose drops. A little bit of lubricant, a vasoconstrictor, an antihistamine, pick a random collection of benefits, stir them up and put a pretty label on them. The majority of such drops are preserved with BAK and as such they pose serious risks to people who buy them and use them regularly.

To me this is a painful failure on the part of the FDA as the warning language in the packaging is completely inadequate. Drops that promise relief of irritation and redness should not contain substances that are known to cause harm if you continue using them. Many of the people these drops are marketed to rarely visit an eye doctor because the level of eye irritation is not severe. There is no one to tell them they are in harm's way.

Anyway, circling back to glaucoma: If you are using glaucoma drops, and you do not know whether they are or aren't preserved, please find out, and talk to your doctor about whether there are preservative free alternatives that would be appropriate for you.

Ocul Surf. 2018 Mar 3. pii: S1542-0124(17)30311-7. doi: 10.1016/j.jtos.2018.03.002. [Epub ahead of print]

Exploring topical anti-glaucoma medication effects on the ocular surface in the context of the current understanding of dry eye.
Wong ABC1, Wang MTM1, Liu K1, Prime ZJ1, Danesh-Meyer HV1, Craig JP2

Abstract
PURPOSE:
To assess tear film parameters, ocular surface characteristics, and dry eye symptomology in patients receiving topical anti-glaucoma medications.

METHODS:
Thirty-three patients with a diagnosis of open angle glaucoma or ocular hypertension, receiving unilateral topical anti-glaucoma medication for at least 6 months, were recruited in a cross-sectional, investigator-masked, paired-eye comparison study. Tear film parameters, ocular surface characteristics, and dry eye symptomology of treated and fellow eyes were evaluated and compared.

RESULTS:
The mean ± SD age of the participants was 67 ± 12 years, and the mean ± SD treatment duration was 5.3 ± 4.4 years. Treated eyes had poorer non-invasive tear film break-up time (p = 0.03), tear film osmolarity (p = 0.04), bulbar conjunctival hyperaemia (p = 0.04), eyelid margin abnormality grade (p = 0.01), tear meniscus height (p = 0.03), and anaesthetised Schirmer value (p = 0.04) than fellow eyes. There were no significant differences in dry eye symptomology, meibomian gland assessments, and ocular surface staining between treated and fellow eyes (all p > 0.05)

CONCLUSIONS:
Adverse changes in tear film stability, tear osmolarity, conjunctival hyperaemia, and eyelid margins were observed in treated eyes. This suggests that inflammatory mechanisms may be implicated in the development of dry eye in patients receiving long term topical anti-glaucoma therapy.

"Adolescents with dry eye disease are underserved"

This is a song sheet I can sing from, for sure! We NEVER see dry eye studies about kids!

Participants in this study were Japanese kids aged 10-19. Asians in general, and the Japanese in particular, are known to have higher rates of dry eye than caucasians, and the 21.7% overall prevalence shown in this study is closely similar to the results from another study in a similar age group done ten years ago by one of the participants in the present study - thank you, Dr Ichino!

But I find it very worrying thing is that we actually have nothing to compare these numbers to on this side of the water. We noted this back when the TFOS DEWS II epidemiology team started reviewing existing research way back in 2015 in preparation for the epidemiology report published last year. They can't report on studies that haven't been done!

There are two findings here in the abstracts which, to me, were startling and interesting points that may have relevance for other populations:

  • The older girls had worse clinical signs than the boys, but reported fewer symptoms than the boys

  • Dry eye prevalence and severity among late adolescent girls was comparable to adults

Int J Ophthalmol. 2018 Feb 18;11(2):301-307. doi: 10.18240/ijo.2018.02.20. eCollection 2018.

Gender differences in adolescent dry eye disease: a health problem in girls.

Ayaki M1, Kawashima M1, Uchino M1, Tsubota K1, Negishi K1.

Abstract

AIM:

To evaluate the signs and symptoms of dry eye disease (DED) in adolescents.

METHODS:

This was a cross-sectional, case-control study and outpatients aged 10 to 19y were recruited from six eye clinics of various practices and locations in Japan, and 253 non-DED subjects and 70 DED patients were enrolled. Participants were examined for DED-related signs. Patients were also interviewed to ascertain the presence or absence of six common DED-related symptoms: dryness, irritation, pain, eye fatigue, blurring, and photophobia. Main outcome measures were differences in signs and symptoms of dry eye disease between boys and girls.

RESULTS:

Of the 323 adolescents recruited, 70 (21.7%) were diagnosed with DED. Significant differences between the non-DED and DED groups were found for short tear break-up time (BUT; ≤5s; P=0.000) and superficial punctate keratopathy (SPK; staining score ≥3; P=0.000). Late adolescent girls reported fewer symptoms than late adolescent boys, although their DED-related signs were worse compared to other groups. The prevalence and severity of DED were similar in the Tokyo area compared with suburban and local areas but myopic errors were worse.

CONCLUSION:

We find that adolescents reported symptoms of DED similar to those found in adults, and the majority have short BUT-type DED. The prevalence and severity of DED in late adolescent girls is comparable with adults. Adolescents with DED are underserved and we believe that DED is a hidden but potentially serious health problem for this age group.

Sleep deprivation and dry eye and chickens and eggs

This abstract was... depressing. And not just because I really don't enjoy reading about animal testing. 

It's that while reading all the ways in which sleep deprivation compromises tear function, I can't help thinking of all those whose sleep deprivation is caused by compromised tear function, whether because they're setting their alarm to get up and add ointment to their eyes to prevent erosions, or the pain factor in general, or the stress from chronic eye pain. Talk about a vicious circle. I guess this is part of why I'm such a fan of taping eyelids down in severe cases.

Lube alone isn't enough. There are many excellent night products - dry eye shields, goggles, masks, and so on that are more convenient and more comfortable. But... when the chips are down and your corneal epithelium is running ragged, tape trumps them all.


Exp Mol Med. 2018 Mar 2;50(3):e451
Sleep deprivation disrupts the lacrimal system and induces dry eye disease.
Li S1,2,3, Ning K1,2,3, Zhou J1,2,3, Guo Y1,2,3, Zhang H1,2,3, Zhu Y1,2,3, Zhang L1,2,3, Jia C1,2,3, Chen Y1,2,3, Sol Reinach P4, Liu Z1,2,3,5, Li W1,2,3,5,6.

Abstract
Sleep deficiency is a common public health problem associated with many diseases, such as obesity and cardiovascular disease. In this study, we established a sleep deprivation (SD) mouse model using a 'stick over water' method and observed the effect of sleep deficiency on ocular surface health. We found that SD decreased aqueous tear secretion; increased corneal epithelial cell defects, corneal sensitivity, and apoptosis; and induced squamous metaplasia of the corneal epithelium. These pathological changes mimic the typical features of dry eye. However, there was no obvious corneal inflammation and conjunctival goblet cell change after SD for 10 days. Meanwhile, lacrimal gland hypertrophy along with abnormal lipid metabolites, secretory proteins and free amino-acid profiles became apparent as the SD duration increased. Furthermore, the ocular surface changes induced by SD for 10 days were largely reversed after 14 days of rest. We conclude that SD compromises lacrimal system function and induces dry eye. These findings will benefit the clinical diagnosis and treatment of sleep-disorder-related ocular surface diseases.

Abstract: Is cataract surgery the old-but-new LASIK, as regards dry eye?

I think this is the most dramatically worded study I've seen on cataract surgery and dry eye. Way to go Dr Galor! It's definitely making me want to go back and re-read some others to remind myself what the numbers were.

Nothing in this surprises me particularly, but it's really something to see it in print. I'm very pleased to see they used a survey that includes the word burning - that's one of the most common and crippling symptoms for those with severe symptoms, but it is omitted way too often in symptom surveys, as  TFOS DEWS II epidemiology report points out. And I love that the participants are almost all men, who are not the primary dry eye demographic, as it makes the results that much more interesting.

  • 95% of participants were men

  • 1/3 of patients have persistent postsurgical pain

  • Prevalence compared with refractive surgery, e.g. LASIK

Cornea. 2017 Dec 7

Epidemiology of Persistent Dry Eye-Like Symptoms After Cataract Surgery.

Iglesias E1, Sajnani R2, Levitt RC3,4,5, Sarantopoulos CD3, Galor A1,6.

Abstract 

PURPOSE:

To evaluate the frequency and risk factors for persistent postsurgical pain (PPP) after cataract surgery, defined as mild or greater dry eye (DE)-like symptoms 6 months after surgery. 

METHODS:

This single-center study included 86 individuals who underwent cataract surgery between June and October 2016 and had DE symptom information available 6 months after surgery. Patients were divided into 2 groups: controls were defined as those without DE symptoms 6 months after surgery (defined by a Dry Eye Questionnaire 5 (DEQ5) score

RESULTS:

Mean age of the study population was 71 ± 8.6 years; 95% (n = 82) were men. DE-like symptoms were reported in 32% (n = 27) of individuals 6 months after cataract surgery; 10% (n = 8) reported severe symptoms (DEQ5 ≥12). Patients with DE-like symptoms after cataract extraction also had higher ocular pain scores and specific ocular complaints (ocular burning, sensitivity to wind and light) compared with controls with no symptoms. A diagnosis of nonocular pain increased the risk of DE-like symptoms after cataract surgery (odds ratio 4.4, 95% confidence interval 1.58-12.1, P = 0.005). 

CONCLUSIONS:

Mild or greater PPP occurred in approximately 1/3 of individuals after cataract surgery. Prevalence of severe PPP is in line with that of refractive surgery, dental implants, and genitourinary procedures.

Abstract: Pollution and the ocular surface

Bit of a summary of what pollution means for dry eye symptoms.

Ocul Surf. 2018 Mar 3. pii: S1542-0124(17)30224-0. doi: 10.1016/j.jtos.2018.03.001. [Epub ahead of print]

Effects of environment pollution on the ocular surface.

Jung SJ1, Mehta J2, Tong L3.

Abstract

The twenty-first century is fraught with dangers like climate change and pollution, which impacts human health and mortality. As levels of pollution increase, respiratory illnesses and cardiovascular ailments become more prevalent. Less understood are the eye-related complaints, which are commonly associated with increasing pollution. Affected people may complain of irritation, redness, foreign body sensation, tearing, and blurring of vision. Sources of pollution are varied, ranging from gases (such as ozone and NO2) and particulate matter produced from traffic, to some other hazards associated with indoor environments. Mechanisms causing ocular surface disease involve toxicity, oxidative stress, and inflammation. Homeostatic mechanisms of the ocular surface may adapt to certain chronic changes in the environment, so affected people may not always be symptomatic. However there are many challenges associated with assessing effects of air pollution on eyes, as pollution is large scale and difficult to control. Persons with chronic allergic or atopic tendencies may have a pre-existing state of heightened mucosal immune response, hence they may have less tolerance for further environmental antigenic stimulation. It is beneficial to identify vulnerable people whose quality of life will be significantly impaired by environmental changes and provide counter measures in the form of protection or treatment. Better technologies in monitoring of pollutants and assessment of the eye will facilitate progress in this field.