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Explore door-to-door eye screening in India as a model to reach school age children in need of eye care, especially during school closures due to the Covid-19 pandemic. Children between 5 and 18 years were screened in an urban-slum of Delhi from September 2020 to March 2021. Screening included capturing ocular complaints, visual acuity and conducting a torchlight examination. Children with any eye-related complaints, gross abnormality or a LogMAR acuity of more than 0.2 in either eye were referred to the nearby vision centre. Data were disaggregated by gender and age group. Reporting after referral and proportion of true positives referrals were used to assess the model. 32,857 children were screened. 55% were boys. Only 917 children (2.8%) had previous eye examinations. 1814 (5.5%) children were referred. Overall compliance rate amongst those referred was 59% (1070 of 1814) and compliance was significantly higher (72%) amongst those referred with poor vision as compared to those with only ocular morbidities (38%). Overall compliance was significantly higher amongst older age group (64% vs 50%) and amongst girls than boys (61% vs 56%). 3.9% children were detected with refractive error (RE) and 2.5% with uncorrected RE which was significantly higher in girls and in older age group. Of 1070 children reporting after referral, 85% had confirmed diagnosis for RE or other ocular pathology. Door-to-door screening had good referral compliance and positive predictive value. We recommend this model as a supplement to school screening especially in regions with low enrolment and high absenteeism in schools. [ABSTRACT FROM AUTHOR]

School eye screening is a crucial strategy in the elimination of childhood blindness because of its ability to reach out to children who are otherwise inaccessible to eye care needs. Comprehensive screening programs are recommended and are beneficial, but the economic aspects of such models remain to be understood. This study aimed to analyse the cost of a comprehensive school eye screening model while utilizing optometrists and optometry students. This cross-sectional study was conducted for 295 schools screened in the academic year 2018–2019. The analysis was performed from the service provider's perspective including only the direct costs. Financial records were used for cost estimates. The outcome measures were cost per school and child, predictors for the cost, DALYs averted, cost of childhood blindness, and Benefit–Cost Ratio. A total of 65 094 children underwent screening from 295 schools. The median (IQR) cost per school and child for screening was $29.65 (29.65–44.34) and $0.66 (0.32–1.13). The regression model predicted that the cost of screening was dependent on school strength, number of screening personnel, distance of the schools, and deliverables. With the interventions to improve compliance, 14686.30 DALYs have been averted. Loss of productivity due to childhood blindness was estimated to be $339070.83. Screening for colour vision also had a Benefit–Cost ratio of greater than one. Cost of screening was low and the benefits were high while utilising optometrist and optometry students along with a comprehensive screening protocol. [ABSTRACT FROM AUTHOR]

To describe the socioeconomic profile, awareness level and reasons for the delay in accessing timely eye care for cataract surgery in patients of lens-induced glaucoma (LIG). This cross-sectional observational study included all patients with LIG who presented to a tertiary eye care centre in central rural India between March 2019 to February 2020. Data were collected through a questionnaire. Out of the 731 patients included in the study, the majority were females (69.36%). The mean age of the patients at presentation was 62.66 ± 10.37 years. Only a few participants, 193 (26.40%) were aware of LIG. Lower socioeconomic profile, older age, female gender and illiteracy were found to be strongly associated with awareness about LIG (p <.001). Patients waiting for the winter season (58.27%) to get operated was the major reason for delayed presentation to the hospital. Other reasons for the delayed presentation were – need not felt (feeling that intervention was not necessary) due to good vision in other eye (14.36%), financial issues (11.63%), long travelling distance (7.11%), no caretaker (6.89%), medical illness (1.78%) and fear of surgery (0.55%). Delayed reporting for eye healthcare in patients of LIG is found to be multifactorial. Most patients preferred waiting for the winter season to get their eyes operated, which throws light on the mindset and ignorance of the patients in this part of central rural India. We further emphasize on strengthening the education and counseling efforts in the community to enable patients to access services in a timely fashion. [ABSTRACT FROM AUTHOR]

To investigate the prevalence, causes and risk factors for vision impairment (VI) among the elderly population in Telangana State, India. A population-based cross-sectional study were conducted in four districts. All participants had eye examinations including visual acuity assessment for distance and near, anterior segment examination and non-mydriatic fundus imaging by trained personnel. VI was defined as presenting visual acuity worse than 6/18 in the better eye. Individuals aged ≥60 years were considered as elderly. In total, 11,238/12,150 (92.5%) individuals aged ≥40 years were examined. Of this, the dataset of 3,640 individuals (32.4%) elderly participants was used for analysis. Among the 3,640 participants, 53.1% were women and 78.1% had no education. The mean age of the participants was 67.8 years (standard deviation: 7 years; range: 60 to 102 years). The age and gender-adjusted prevalence of VI was 32.1% (95% CI: 29.5–34.8). On multivariable analysis, the odds of VI was significantly higher in older age groups, and among those with no education. Gender and district of residence were not associated with the prevalence of VI. Cataract (54.8%) was the leading cause of VI followed by uncorrected refractive errors (37.6%). VI was common and largely avoidable in the elderly population in Telangana state in India. Elderly centric eye care including screening for vision loss, provision of cataract surgery and spectacles can be used as strategies to address VI in the elderly. [ABSTRACT FROM AUTHOR]

To estimate prevalence and causes of avoidable blindness among people ≥50 years and to assess willingness to pay (WTP) for cataract surgery in tribal region of south Gujarat, India. A cross-sectional population based survey was conducted with 44 randomly selected clusters each having 50 people aged ≥50 years selected by probability proportional to size of sampling. Adults identified with cataract causing visual loss (<6/18) in any eye were interviewed to assess their WTP for surgery. Total of 2137 examined out of 2200 people enumerated (response rate 97.1%). The prevalence of blindness (Presenting Visual Acuity (PVA)<3/60 in better eye) was 2.23% (95% CI: 2.95%–1.51%). Cataract was main cause of blindness (67.3%) followed by corneal scarring (8.2%). Major barrier to cataract surgery cited by bilaterally blind people was lack of escort to the surgical facility (34.3%). Cataract surgical coverage (CSC) was 84.9% (eyes) and 92% (persons). Of the 492 people interviewed to assess WTP for their surgery, only 36.4% people were willing to pay. The tribal population has a high poverty profile in India. Within this group, cataract remains the main treatable cause of blindness despite a high CSC. Assessment of barriers suggested that a well-coordinated outreach programme with free transport facilities to the surgical facility is required along with strategies to improve accessibility and prioritising cataract blind in the community. One-third of people were willing to pay for their surgeries implying that cross subsidization or tier system could be feasible for eye care programme sustainability. [ABSTRACT FROM AUTHOR]

The integration of primary eyecare into existing primary healthcare systems requires simple yet effective tools that do not overburden the grass-root level worker. The objective of this study was to test the accuracy of a questionnaire-based tool administered by trained community-based rehabilitation volunteers (CBRVs) in identifying persons with visual disability, proportions accessing referral pathway and barriers to uptake of eyecare services. CBRVs working in the urban-slum service area of a teaching hospital were trained in administering a questionnaire-based tool derived from the World Health Organization (WHO) "Training in the community for people with disabilities" to a responsible adult member of the household. Post-training, they screened and referred adults with perceived visual problems. This tool was tested against two reference standards: (i) history of visual disability elicited by ophthalmologist; (ii) pre-set visual acuity and diagnosis criteria. Ten CBRVs screened 950 individuals of whom 805 (84.7%) were examined by an optometrist and ophthalmologist. Sensitivity and specificity of this method were 75% (95% CI 72–78%), 95.8% (95% CI 94–98%) respectively, using history and 60.2% (95% CI 57–63%), 91.8% (95% CI 90–94%) using clinical criteria as reference standard. Referral pathway was used by 91/221 (41.2%) referred individuals. The commonest barriers to accessing eye care were 'did not feel the need' (32.2%) and 'busy with work/household responsibilities' (30.2%). This questionnaire-based tool administered by grass-root level health workers to a responsible adult member of the family may be a promising screening method for identification and appropriate referral of persons with visual disability in the community. [ABSTRACT FROM AUTHOR]

Purpose: Primary eye care services delivered through vision centres (VC) form an essential part of the national blindness control efforts, but systematic data on the outputs and cost of providing such services in India are not readily available for further planning and efficient use of resources. Methods: Detailed cost and output data were collected from written records for 2017–2018 fiscal year using standardized methods at nine VC in Kolkata city in West Bengal, India. The total economic cost for these VC was computed and the relation of unit cost of services per patient screened with VC scale was assessed using regression analysis. Break-even point was estimated from average and marginal cost functions. Results: 25,009 patients were screened at the 9 VC (range 709–5,717; median 2,826). The overall total economic cost was INR 7,304,172 (USD 113,306), ranging from INR. 509,618 (USD. 7,905) to INR. 1,390,855 (USD. 21,576). Personnel salaries made up 37.8% of the total cost. The unit economic cost of screening a patient was INR 292.1 (USD 4.4) and varied threefold between 9 VC. With a multiple regression model (p <.035, R2 = 0.797), apart from the fixed costs, the incremental cost for each patient screened was INR 81.33 (USD 1.26). Break-even analysis suggested that 44.4% of the VCs were functioning below optimal scale. Conclusion: A further reduction in the unit costs is possible if the optimal scale of services is achieved. These findings can inform resource requirement for the primary eye care services in India. [ABSTRACT FROM AUTHOR]

Purpose: To determine the repeatability and reproducibility of anterior segment optical coherence tomography (AS-OCT) and Scheimpflug photography for several measurements of corneal scars, including scar size, scar depth, and corneal thickness. Methods: A series of patients treated for fungal keratitis at a tertiary eye care center in South India were recalled two years after successful treatment. Eyes with corneal scars had a slit lamp examination performed by two ophthalmologists masked to the other's examination. For AS-OCT and Scheimpflug photography, each eye had two scans taken by one technician and a third scan taken by a separate technician. Scar measurements were subsequently assessed from AS-OCT images by three graders masked to each other's results. Repeatability and reproducibility were assessed by calculating the intra-class correlation coefficient (ICC) from mixed effects linear regression models. Results: Fifty eyes had all measurements taken. The corneal scar size, measured as the geometric mean of the two longest perpendicular meridians, ranged from 0.8 to 5.4 (mean 2.8 mm, 95%CI 2.6 to 3.1). Scar size measurements taken by two separate individuals were most reproducible when the border of the scar was traced from the OCT (ICC 0.90, 95%CI 0.86 to 0.94), and least repeatable when assessed from slit lamp examination (ICC 0.80, 95%CI 0.70 to 0.90). Conclusions: AS-OCT and Scheimpflug imaging of corneal scars produced measurements with acceptable reproducibility that could be useful as cornea-specific outcomes for clinical trials. [ABSTRACT FROM AUTHOR]

Purpose: To determine the prevalence of childhood blindness and ocular morbidity in a rural pediatric population in South India. Methods: A population-based, cross-sectional survey of children was conducted in three phases in Pavagada and Madhugiri taluks (subdivisions) of Tumkur district in the state of Karnataka, India. In the first phase, trained fieldworkers screened 23,100 children. In the second phase, children with eye diseases were referred to the peripheral hospital to be examined by a general ophthalmologist. In the third phase, children with major eye diseases were examined by a pediatric ophthalmologist. Results: The prevalence of ocular morbidity was 2.66% (95% confidence interval, CI, 2.46–2.87%). The most commonly observed ocular morbidity was Bitot spots (1%) followed by refractive error (0.6%). In total, 18 children were blind and the prevalence of childhood blindness (best-corrected visual acuity <3/60) was 0.08% (95% CI 0.04–0.11%); 8 (44.44%) had retinal blindness, 5 (27.76%) had lens-related blindness, 2 (11.11%) had bilateral microphthalmos, 1 (5.56%) was blind due to anterior staphyloma in the right eye and anophthalmos in the left eye, 1 (5.56%) had bilateral uveal coloboma and 1 (5.56%) had cortical visual impairment. Conclusions: Nearly half of the blindness in the population was due to unavoidable causes (retinal). In addition to providing eye care services, an appropriate service delivery model would include the provision of rehabilitative and low vision services and implementation of genetic studies to understand the causes and increase awareness of inherited eye diseases. [ABSTRACT FROM PUBLISHER]

Purpose: Prevalence of cataract related blindness and visual impairment is extremely high in India. Service utilization, on the contrary, is sub-optimal. Services offered through outreach screening are often not taken up. Against this background, the decision making processes leading to the uptake of cataract surgery services offered during outreach screening camps were investigated in people with cataract in India. Methods: The study used an exploratory, qualitative approach. Sixty one cataract patients from two eye hospitals in Hyderabad, India, were interviewed using convenience sampling. Two focus group discussions with cataract patients and interviews with seven key informants helped triangulate the information. Results: Lack of access to personal funds limited and delayed the utilization of offered services by patients who had been advised of surgery at outreach screening camps or eye hospitals. Stigma, fatalism and ageism were other limiting factors. The majority of patients did not make the decision regarding uptake of services themselves. Hearsay reports of the outcome of surgery and quality of services had a strong influence on service uptake. Women, particularly widows and those from rural areas, were least likely to use cataract surgery services. Conclusion: Provision of affordable and accessible eye care does not guarantee that the care or service will be utilized. Within the decision making process about cataract surgery, dependency on and importance of the wider family was found to be an often cited context of patients' decisions. Future research and programming activities need to put an emphasis on underserved groups, especially those who may be marginalized or disempowered. [ABSTRACT FROM AUTHOR]