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Objective Paediatric vision screening programs identify children with ocular abnormalities who would benefit from treatment by an eye care professional. A questionnaire was conducted to assess existence and uptake of school-based vision screening programs across Canada. A supplementary questionnaire was distributed among Ontario’s public health units to determine implementation of government mandated vision screening for senior kindergarten children. Methods Chief Medical Officers of Health for each province and territory, and Ontario’s thirty-four public health units were sent a questionnaire to determine: 1) whether school-based vision screening is being implemented; 2) what age groups are screened; 3) personnel used for vision screening; 4) the type of training provided for vision screening personnel; and 5) vision screening tests performed. Results Of the thirteen provinces/territories in Canada, six perform some form of school-based vision screening. Two provinces rely solely on non-school-based programs offering eligible children an eye examination by an optometrist and three rely on ocular assessment conducted by a nurse at well-child visits. In Ontario, where since 2018 vision screening for all senior kindergarten students is government mandated, only seventeen public health jurisdictions are implementing universal vision screening programs using a variety of personnel ranging from food safety workers to optometrists. Conclusion Good vision is key to physical and emotional development. There is an urgent need for a universal, evidence-based and cost-effective multidisciplinary approach to standardize paediatric vision screening across Canada and break down barriers preventing children from accessing eye care.

Retinopathy of prematurity (ROP) is a significant cause of potentially preventable blindness in preterm infants worldwide. It is a disease caused by abnormal retinal vascularization that, if not detected and treated in a timely manner, can lead to retinal detachment and severe long term vision impairment. Neonatologists and pediatricians have an important role in the prevention, detection, and management of ROP. Geographic differences in the epidemiology of ROP have been seen globally over the last several decades because of regional differences in neonatal care. Our understanding of the pathophysiology, risk factors, prevention, screening, diagnosis, and treatment of ROP have also evolved over the years. New technological advances are now allowing for the incorporation of telemedicine and artificial intelligence in the management of ROP. In this comprehensive update, we provide a comprehensive review of pathophysiology, classification, diagnosis, global screening, and treatment of ROP. Key historical milestones as well as touching upon the very recent updates to the ROP classification system and technological advances in the field of artificial intelligence and ROP will also be discussed.

PurposeRetinopathy of prematurity (ROP) is a potentially blinding condition affecting premature infants for which less than 10% of babies undergoing screening require treatment. This study assessed and validated predictors of developing clinically significant ROP (type 2 or worse) and ROP requiring treatment.DesignNationwide retrospective cohort study.MethodsThis study included infants born between January 2014 and June 2016, admitted to level 3 neonatal intensive care units across Canada who underwent ROP screening. Data were derived from the Canadian Neonatal Network database. Predefined ≥ 1% risk for clinically significant retinopathy or prematurity and ROP requiring treatment was set as threshold for screening. Thirty-two potential predictors were analyzed, to identify and validate the most important ones for predicting clinically significant ROP. The predictors were determined on a derivation cohort and tested on a validation cohort. Multivariable logistic regression modeling was used for analysis.ResultsUsing a sample of 4,888 babies and analyzing 32 potential predictors, capturing babies with ≥1% risk of developing clinically significant ROP equated to screening babies with birth weight (BW) ConclusionsThe Canadian ROP screening criteria can be modified to screen babies with BW

Objective We aimed to develop and assess the reliability of a questionnaire assessing parental knowledge on core topics in pediatric eye health. Methods In Phase I, the Evaluate Your Eye Education Questionnaire (EYEE-Q) was developed and distributed to ascertain face validity (n = 20). In Phase II, participants completed EYEE-Q twice to determine test-retest reliability (n = 40). In Phase III, EYEE-Q was administered to parents in a tertiary level pediatric ophthalmology clinic to assess knowledge (n = 193). Results EYEE-Q had good test-retest reliability (Kripendorff’s alpha = 0.77). Mean knowledge was 71% on eye physiology, 59% on pediatric vision care, 58% on refractive error, 53% on common childhood eye conditions, and 48% on eye care professional (ECP) roles. Low income, non-Caucasian race, and English as a second language status were associated with poorer scores. Conclusion EYEE-Q is a reliable means of assessing parental knowledge on select pediatric eye health–related topics. Knowledge appears to be suboptimal among parents of children attending tertiary level ophthalmology clinics. ECPs should actively provide educational materials in various languages and formats to promote understanding of medical jargon and patient compliance. The influence of educational interventions on knowledge can be assessed using the EYEE-Q.

Purpose Evidence-based medicine is guided by our interpretation of randomized controlled trials (RCTs) that address important clinical questions. Evaluation of the robustness of statistically significant outcomes adds a crucial element to the global assessment of trial findings. The purpose of this systematic review was to determine the robustness of ophthalmology RCTs through application of the Fragility Index (FI), a novel metric of the robustness of statistically significant outcomes. Design Systematic review. Methods A literature search (MEDLINE) was performed for all RCTs published in top ophthalmology journals and ophthalmology-related RCTs published in high-impact journals in the past 10 years. Two reviewers independently screened 1811 identified articles for inclusion if they (1) were a human ophthalmology-related trial, (2) had a 1:1 prospective study design, and (3) reported a statistically significant dichotomous outcome in the abstract. All relevant data, including outcome, P value, number of patients in each group, number of events in each group, number of patients lost to follow-up, and trial characteristics, were extracted. The FI of each RCT was calculated and multivariate regression applied to determine predictive factors. Results The 156 trials had a median sample size of 91.5 (range, 13–2593) patients/eyes, and a median of 28 (range, 4–2217) events. The median FI of the included trials was 2 (range, 0–48), meaning that if 2 non-events were switched to events in the treatment group, the result would lose its statistical significance. A quarter of all trials had an FI of 1 or less, and 75% of trials had an FI of 6 or less. The FI was less than the number of missing data points in 52.6% of trials. Predictive factors for FI by multivariate regression included smaller P value ( P P = 0.001), larger number of events ( P = 0.011), and journal impact factor ( P = 0.029). Conclusions In ophthalmology trials, statistically significant dichotomous results are often fragile, meaning that a difference of only a couple of events can change the statistical significance. An application of the FI in RCTs may aid in the interpretation of results and assessment of quality of evidence.

Objective To examine current level three Neonatal Intensive Care Unit (NICU) practices related to ROP screening and treatment. Study design A cross-sectional survey was sent to 29 level three NICU's across Canada to survey current screening inclusion criteria, treatment options, supportive care and post-screening events for ROP. Result 22/29 (76%) level three NICU's responded. Ten different ROP screening inclusion criteria were found to be in use with significant variation in gestational age and birth weight criteria. Many other national variations also exist regarding the supportive and procedural protocols surrounding ROP screening as well as mode of treatment for ROP. Conclusion Despite national guidelines, significant variation in ROP screening inclusion criteria practices exist among neonatal units in Canada. Therefore, there is an urgent need for better evidence-based screening guidelines as well as a need to standardize supportive measures surrounding ROP screening and treatment.

Retinopathy of prematurity (ROP) is a potentially blinding condition affecting premature infants for which less than 10% of babies undergoing screening require treatment. This study assessed and validated predictors of developing clinically significant ROP (type 2 or worse) and ROP requiring treatment.Nationwide retrospective cohort study.This study included infants born between January 2014 and June 2016, admitted to level 3 neonatal intensive care units across Canada who underwent ROP screening. Data were derived from the Canadian Neonatal Network database. Predefined ≥ 1% risk for clinically significant retinopathy or prematurity and ROP requiring treatment was set as threshold for screening. Thirty-two potential predictors were analyzed, to identify and validate the most important ones for predicting clinically significant ROP. The predictors were determined on a derivation cohort and tested on a validation cohort. Multivariable logistic regression modeling was used for analysis.Using a sample of 4,888 babies and analyzing 32 potential predictors, capturing babies with ≥1% risk of developing clinically significant ROP equated to screening babies with birth weight (BW)1,300 g or gestational age (GA)30 weeks while capturing babies with ≥1% risk of requiring ROP treatment equated to screening babies with BW1,200 g or GA29 weeks.The Canadian ROP screening criteria can be modified to screen babies with BW1,200 g or GA30 weeks. Using these criteria, babies requiring treatment would be identified while reducing the number of babies screened unnecessarily.

Measurement of the intraocular pressure (IOP) is central to the diagnosis and management of pediatric glaucoma. An examination under anesthesia is often necessary in pediatric patients. Different agents used for sedation or general anesthesia have varied effects on IOP. Hemodynamic factors, methods of airway management, tonometry technique, and body positioning can all affect IOP measurements. The most accurate technique is one that reflects the awake IOP. We review factors affecting IOP measurements in the pediatric population and provide recommendations on the most accurate means to measure IOP under anesthesia based on the present literature.

Aim The aim of this study was to assess the potential of using video screening to interpret the results of paediatric eye examinations. Design Prospective multi-centred, blinded study. Methods Children aged 5 months to 11 years referred to a paediatric ophthalmology centre were enrolled in the study. Outcome measures included the degree of agreement between examiners for assessment of various aspects of paediatric eye examination. In Phase 1, children were individually assessed in the clinic by three different examiners to determine the level of agreement. In Phase 2 a video recording was made of the first ophthalmologist examining the children. The other two examiners viewed the video recordings to make their diagnoses. Areas of assessment included lid function, pupillary function, ocular motility, strabismus, nystagmus, torticollis and facial asymmetry. Agreement between examiners was measured using Gwet’s agreement coefficient (AC1). Results A total of 27 patients in Phase 1 (mean age 4.0 years) and 160 children in Phase 2 (mean age 4.8 years) underwent clinical and video-recorded screening. In Phase 1, all but one area of ocular examination (heterotropia) achieved ≥84% agreement between three examiners. In Phase 2, there was greater variation between direct clinical examination and interpretation of video findings, ranging from 55–100% agreement. Conclusion Using experienced clinicians and changing only one variable in Phase 2 (the method of assessment – direct examination versus video interpretation), the results show the possible usefulness of video-recorded screening as a means of assessing children. Further research is indicated to assess the accuracy of ophthalmologists interpreting video recordings of eye examinations performed by trained non-eye-care professionals.

Background The purpose of this study was to test the sensitivity and specificity of eight undergraduate volunteer examiners conducting vision screening tests in a community setting, in order to determine if non-eye care professionals were able to be trained to an appropriate level of skill. Methods Eight undergraduate volunteer examiners were trained to conduct vision screening tests to address a gap in pediatric community eye care. Phase I of the study was implemented in the pediatric ophthalmology clinic, and phase II was conducted in nine local schools. Phase I consisted of 40 h of training for each volunteer regarding specific vision tests. Phase II consisted of screening children at nine local schools. Results A total of 690 children from nine local schools were screened by both the volunteer examiners and the optometrist during the course of this study. Volunteer examiners had a screening sensitivity of 0.80 (95%CI 0.66–0.90) and screening specificity of 0.75 (95%CI 0.71–0.78) when compared to the study optometrist. The overall accuracy of volunteer examiners was 75%. The resulting positive likelihood ratio was 3.24 (95%CI 2.6–3.9), indicating that a child with vision impairment was 3.2 times more likely to fail the vision test performed by the volunteer examiners compared to a child with no vision impairment. Conclusions Non-healthcare professionals can be trained to an acceptable degree of accuracy to perform vision screening tests on children, which may assist in mitigating existing gaps in paediatric eye care.

Objective Young people are a relatively underrepresented group in literature on poor vision and blindness. This study assessed the quality of life and function of young people who have poor vision or blindness by asking directly about their personal experiences. Methods A modified version of the VFQ-25 was administered to 47 students at a school for blind youth. All students who received the test had visual acuity scores of 20/100 or worse. The VFQ-25 scoring system was used, and results from additional qualitative questions were themed and ranked. Further analysis was performed, using Spearman's rank correlation coefficient to check for correlation between duration of blindness and VFQ score. Results Participants recorded a composite VFQ score of 65, showing that poor vision had a self-perceived moderate effect on their daily function. Proportion of participant's life spent with visual impairment correlated with higher composite scores. In general, lower scores were reported by participants with worse visual acuity. However, variations were observed in the mental health category. Conclusions Young people have a more optimistic and nuanced view of their function than expected based on VFQ scores of other groups. Larger studies, particularly ones including youth in non-specialized schools would be useful to expand these findings.

Evidence-based medicine is guided by our interpretation of randomized controlled trials (RCTs) that address important clinical questions. Evaluation of the robustness of statistically significant outcomes adds a crucial element to the global assessment of trial findings. The purpose of this systematic review was to determine the robustness of ophthalmology RCTs through application of the Fragility Index (FI), a novel metric of the robustness of statistically significant outcomes.Systematic review.A literature search (MEDLINE) was performed for all RCTs published in top ophthalmology journals and ophthalmology-related RCTs published in high-impact journals in the past 10 years. Two reviewers independently screened 1811 identified articles for inclusion if they (1) were a human ophthalmology-related trial, (2) had a 1:1 prospective study design, and (3) reported a statistically significant dichotomous outcome in the abstract. All relevant data, including outcome, P value, number of patients in each group, number of events in each group, number of patients lost to follow-up, and trial characteristics, were extracted. The FI of each RCT was calculated and multivariate regression applied to determine predictive factors.The 156 trials had a median sample size of 91.5 (range, 13-2593) patients/eyes, and a median of 28 (range, 4-2217) events. The median FI of the included trials was 2 (range, 0-48), meaning that if 2 non-events were switched to events in the treatment group, the result would lose its statistical significance. A quarter of all trials had an FI of 1 or less, and 75% of trials had an FI of 6 or less. The FI was less than the number of missing data points in 52.6% of trials. Predictive factors for FI by multivariate regression included smaller P value (P 0.001), larger sample size (P = 0.001), larger number of events (P = 0.011), and journal impact factor (P = 0.029).In ophthalmology trials, statistically significant dichotomous results are often fragile, meaning that a difference of only a couple of events can change the statistical significance. An application of the FI in RCTs may aid in the interpretation of results and assessment of quality of evidence.

Purpose To assess the use of limbal versus fornix conjunctival incisions in primary and repeat horizontal rectus muscle surgeries among pediatric ophthalmologists and adult strabismus surgeons. Methods A 2-page questionnaire was mailed to members of the American Association for Pediatric Ophthalmology and Adult Strabismus. Participants were asked about their use of limbal, fornix, or other incision types in their pediatric and adult strabismus patient population. Results A total of 1,022 questionnaires were circulated. The net overall response rate was 27.8%. For first-time strabismus surgeries in pediatric patients, 40.8% of respondents used limbal incisions in the majority of their cases, 58.1% used fornix incisions, and 1.1% used other incision types. For reoperations, 58.1% used limbal-based incisions, 39.1% used fornix incisions, and 2.1% used other incision types. In the majority of their primary surgeries on adults, 40.1% used limbal incisions, 53.5% preferred fornix incisions, 1.4% used other incision types, and 4.9% answered "not applicable" (available for respondents who operated exclusively on either children or adults). On reoperations, limbal incisions were used by 63.4% of respondents, 29.9% used fornix incisions, 1.4% used other incision types, and 5.3% answered "not applicable." Conclusions Among those surveyed, limbal incisions were preferred for greater intraoperative exposure and better teaching of junior surgeons; fornix incisions were thought to cause less postoperative pain and inflammation and lead to more rapid soft-tissue healing.

PurposeThe purpose of the study was to evaluate the feasibility and acceptability of utilizing elbow splints as a method of increasing amblyopic patching compliance in pediatric ophthalmology patients who fail to comply with prescribed patching regimens.Patients and methodsPatients6 years of age who were not adhering to pre-specified patching guidelines were prescribed elbow splints in order to increase patching compliance at the discretion of a pediatric ophthalmologist. If the child was non-compliant (patching50% of specified time or consistently removing patch), parents were asked to try using the elbow splints until patching compliance was achieved. Non-parametric Wilcoxon signed-rank tests were used to compare patching time pre- and post-splints.Results41/48 children who were prescribed elbow splints to increase patching compliance for amblyopia were included for analysis. Seven children were excluded due to patching and splints being prescribed at the outset (n=4), and for not using the splinting intervention (n=3). Median age at being prescribed elbow splints was 37 (12-68) months. Mean daily patching prior to splints was 1.5±1.7 h, whereas mean prescribed daily patching was 4.95±1.5 h. Following splinting, 34/41 (83%) became compliant with patch alone, and visual acuity increased in 39/41 (95%) patients, with no patients developing amblyopia in the fellow eye. Median amount of time splints was required to improve compliance was 7 (1-240) days.ConclusionElbow splinting seems to be a viable alternative method to increase pediatric amblyopic patching compliance when patching alone fails to achieve satisfactory compliance.

* Abbreviation: ROP — : retinopathy of prematurity It has been over 70 years1 since Terry first described a case of retrolental fibroplasia, later to be known by its modern day name: retinopathy of prematurity (ROP). Although major advances have been made in terms of understanding the pathophysiology and development of treatment plans for ROP, cost-effective screening has emerged as an important global challenge when dealing with ROP in the 21st century. The traditional model of ROP screening involves regular direct eye examinations by trained ophthalmologists on all at-risk neonates. However, the weaknesses of this model have become evident when one considers that: there is an ever increasing worldwide population of premature births; most premature births in the world … Address correspondence to Kourosh Sabri, MB ChB, FRCOphth, Department of Surgery, McMaster Children’s Hospital, 1200 Main St West, Hamilton ON, Canada L8N3Z5. E-mail: sabrik{at}mcmaster.ca

Objective To survey the current inclusion criteria used for retinopathy of prematurity (ROP) screening across tertiary level 3 neonatal intensive care units (NICUs) in Canada. Participants Clinical directors from 29 level 3 NICUs in Canada. Methods Survey of all 29 level 3 NICUs in Canada in September 2010. The survey inquired about the current ROP screening criteria in use in each centre including which neonates are enrolled in the screening program and the timing of when screening begins. The survey was sent via email to the clinical directors at each site. Nonrespondents were contacted by telephone. Results In total, 23 centres replied, representing a 79% response rate with the survey. Seven different ROP screening inclusion criteria were found to be in use, although one of the centres did not have a clear inclusion protocol. The variation between centres was significant, with some using a combination of birth weight and gestational age and others using birth weight or gestational age alone as their criterion. There was also variation in the timing of initial eye examinations, with 8 different criteria currently in use. Discrepancies were also found among treatment patterns at the centres. Conclusions Despite the publication of updated Canadian guidelines in 2000, there continues to be significant variation in the actual inclusion criteria being used across the country. Therefore, a need exists for comprehensive, evidence-based Canadian guidelines to optimize the screening inclusion criteria for ROP.

Background: The aim of this study was to assess the incidence and outcome of severe retinopathy of prematurity (ROP) among different ethnic groups in a geographically defined population in the U.K. Severe ROP was defined as any stage 3 or worse disease. Methods: This was a retrospective study of children born over a 6-year period with a birth weight of 1250 g or less. Threshold ROP was treated with diode laser. Results: Severe disease developed in 37 out of 355 neonates (10.4%) who underwent ROP screening. The difference in the incidence of severe ROP between infants of Caucasian and South Asian ethnic origin was not statistically significant: 10.2% vs. 10.8% (odds ratio=1.06; 95% confidence interval: 0.44 to 2.57). This conclusion held after single-variable adjustment for birth weight, gestational age, and score on the Clinical Risk Index for Babies. The incidence of threshold ROP was 3% among infants of both Caucasian and South Asian ethnic origin. There was no significant difference in terms of visual outcome between the Caucasian and South Asian infants. Interpretation: This study showed no statistical evidence for a difference in the incidence or outcome of severe ROP among infants of South Asian ethnic origin compared with those of Caucasian origin. Although the small numbers in our study mean that a clinically important difference cannot be excluded, it is very unlikely that the 5-fold higher incidence in Asian babies described in the literature is correct for the population from which our subjects were drawn.

Objective To conduct a national survey of journal club curricula in Canadian ophthalmology residency programs. Design Cross-sectional web-based survey. Participants Fifteen Royal College of Physicians and Surgeons of Canada (RCPSC) ophthalmology residency program directors. Methods The 15 RCPSC ophthalmology residency program directors were invited to participate in a 31-item online survey. The survey inquired about the purpose, educational goals, and structure of journal club. Basic statistics were performed to compare responses across institutions. Results Thirteen of the 15 program directors replied, representing an 87% response rate. Twelve (92%) institutions maintained a journal club. All of the program directors surveyed felt that journal club had educational value. Resident attendance was typically mandatory (75%) and correspondingly high across programs. There was 100% agreement that randomized controlled trials were most often selected for review. The primary journal club objectives were for residents to develop critical appraisal skills and to conduct a literature search (67%). Formal teaching and evaluation of these skills were not prioritized by any program. Seventeen percent felt the most important objective was to impact clinical practice. Conclusions Canadian ophthalmology program directors expressed high levels of satisfaction that journal club was effective in meeting its stated objectives. This indicates that the teaching model promoted resident critical appraisal skills; however, objective evaluation methods to assess resident competence in evidence-based medicine were not described by any respondents. As RCSPC ophthalmology programs transition to competency-based medical education, program directors may consider modifying journal club curriculum, broadening its utility toward a means of outcome assessment.

Background The effect of adding oral to topical carbonic anhydrase inhibitors in the management of pediatric glaucoma is unknown. Methods We undertook a retrospective analysis of children with a diagnosis of glaucoma before the age of 16 years who initially were treated with topical dorzolamide or dorzolamide–timolol combination and then treated with oral acetazolamide. Children who had uveitic glaucoma or who had ocular surgery within 3 months before or during oral acetazolamide therapy were excluded. Various methods of intraocular pressure (IOP) measurement were used in the study. However, in each case, the IOP was measured using the same technique, once at the last visit before the addition of oral acetazolamide and once at the first examination after the addition of oral acetazolamide. Results Twenty-two patients were included in the study with an age range of 8 months to 15 years. Seventeen children were boys. Oral acetazolamide treatment was via a daily dose (13.3 to 30 mg/kg, mean 22.5 mg/kg), and duration (6 to 31 days, mean 18.1 days). The intraocular pressure (mean ± SD) before acetazolamide (32.2 ± 6.5 mm Hg) was significantly different than after acetazolamide (21.8 ± 6.3 mm Hg) with a mean difference of 10.36 mm Hg (p Conclusions The addition of oral acetazolamide to topical dorzolamide may provide additional reduction in IOP in some children already being treated with topical carbonic anhydrase inhibitors. This possible additive effect has not been observed in adults treated with a combination of topical and systemic carbonic anhydrase inhibitors.

Non-traumatic sixth nerve palsy in the 20-50 years old group is unusual and a detailed history is often needed to identify serious and potentially reversible causes. We present a case of sixth sense nerve palsy in a young female with eczema for which she was treated with low-dose cyclosporin. We review the indications for and ocular side effects of cyclosporin, a drug with which most ophthalmologists will be unfamiliar.

We present a case of a 3-year-old girl with a positive family history of neurofibromatosis type-1 (NF1) presented with best corrected visual acuity of 20/40 in the right eye and

Purpose To survey the different methods used in the management of corneal abrasions (including iatrogenic cases) nationally. Method A questionnaire survey of all 162 ophthalmic units in the UK was carried out in 1997. Results The response rate was 134 of 162 (83%). The majority of units do not have an established policy for the treatment of corneal abrasions. Topical antibiotic alone and antibiotic together with a cycloplegic are the commonest immediate treatments, whilst the most common treatment course is topical antibiotic. Padding and patient follow-up is practised some of the time by most units and all of the time by the remaining minority. Use of a soft bandage contact lens is uncommon. There is no statistically significant difference (p

Angiotensin (Ang) II is one of the key hormones involved in cardiovascular homeostasis. It has potent vasoconstrictor effects and is directly involved in the vascular and cardiac remodeling observed in response to chronic or acute hypertension. Two major Ang II receptor subtypes, AT1 and AT2, have been described, and their roles in vivo and in vitro have now been investigated using nonpeptidic antagonists, losartan and PD123319, which block AT1 and AT2 receptors respectively. The aim of this review is to focus on in vivo data to better define the respective functions of the AT1 and AT2 receptor subtypes. In adult rats, the AT1 receptor subtype does not trigger trophic effects directly in cardiomyocytes, whereas the AT2 receptor may have a major trophic role in smooth muscle cells.

Pneumocystis jiroveci is a commensal found in the respiratory tract of healthy individuals. It can cause infections of almost any organ in immunocompromised hosts. P jiroveci choroiditis, featuring multifocal choroidal lesions, has been reported in immunocompromised patients despite prophylactic use of inhaled pentamidine. We report a post-transplant leukaemic patient whose posterior segment findings demonstrate an atypical picture of recurrent P jiroveci choroiditis. A 20 year old woman presented with a 1 week history of bilateral blurred vision, dyspnoea, and dry cough. Visual acuity was reduced to 6/36 bilaterally with posterior subcapsular cataracts. Funduscopy disclosed multifocal, creamy-yellow choroidal lesions at both posterior poles with exudative retinal detachments at the maculae (fig 1). Optic discs …

PURPOSE. To assess the impact of amblyopia, strabismus and glasses on subjective visual and psychological function among amblyopes. METHODS. Questionnaires were administered to 120 teenagers with amblyopia (cases), with residual amblyopia after treatment, or with or without strabismus and 120 control subjects (controls) Cases underwent ophthalmic examination including cycloplegic refraction. Two questionnaires (visual function 14 [VF-14] and a newly designed eight-item questionnaire) were administered to assess the psychological impact score of general daily life, having a weaker eye, glasses wear, and current noticeable strabismus. Questionnaires were validated in 60 subjects in each group by a second administration of the questionnaire. The VF-14 scores, psychological impact scores, and clinical data were compared. RESULTS. The VF-14 and psychological impact scores were highly reproducible. The mean VF-14 score for the control group was 95.5 and for the cases was 78.9 (P < 0.0001), but the scores did not correlate with the severity of amblyopia. The psychological impact score in general daily life was sensitive in discriminating between mild (median score 31) and moderate to severe (median score 56) amblyopes (P < 0.02). The cases segregated into two clear groups; those who scored high (large detrimental psychological impact) on psychological impact, with subjectively noticeable manifest strabismus, and those who scored low (low detrimental psychological impact), without noticeable strabismus. The subjective experience of patching treatment differentiated the two groups best of all. CONCLUSIONS. Subjective visual and psychological functions are altered compared with normal subjects due to amblyopia, strabismus, and a previous unpleasant patching experience. The mean VF-14 score was similar to that previously published for patients with glaucoma. The study underlines that amblyopia and/or strabismus have an impact on teenagers' subjective visual function and well-being.

This paper deals with the problem concerning the framework of rotating machines diagnostics by using signal processing advanced tools and more precisely Blind Source Separation (BSS) methods. An application on gear box is given, the objective is to separate gear mesh signals corresponding to each reducer's wheel. It enables us to diagnose and separate each defect in the event of degradation. The proposed method exploits the information redundancy around the meshing frequency and its harmonics resulting from cyclostationarity properties. This redundancy allows us to separate the contribution of each wheel from only one sensor, by tacking advantage of the non-uniformity of the Mechanical Structure Frequency Response (MSFR) connecting the exciting source to the sensor.