Use of spectacles for distance vision: coverage, unmet needs and barriers in a rural area of North India.

BACKGROUND: Uncorrected refractive errors contribute enormously to the burden of avoidable visual impairment worldwide. There is a huge disparity in different parts of the globe in context to spectacle coverage for distance vision. This study was undertaken with objectives of determining prevalence of spectacle coverage, unmet needs and associated factors among adults in a rural community of north India. METHODS: A community-based cross-sectional study was carried out within selected clusters of Jhajjar district of Haryana. All participants aged > 15 years underwent visual acuity assessment by LogMAR "E" screening chart. Participants with presenting visual acuity < 6/12 in any eye and all current spectacle users underwent detailed ophthalmic examination and refraction. Additional details about spectacles, barriers for their use and willingness to pay for them were collected. Participants with met and unmet need for spectacle use at visual acuity > 6/12 was computed. These are reported as proportions with 95% confidence intervals. Associated factors with unmet need were determined using bivariable and multivariable logistic regression analysis. RESULTS: A total of 6910 participants were examined. The current spectacle use was 7.5% (95% Confidence Interval CI: 6.5, 8.7). The spectacle coverage was found in 33.3% (95% CI: 30.0, 36.7) participants among those in need. The unmet need was found in 10.8% of participants (95% CI: 10.1, 11.6). On multivariable analysis, odds of unmet need was associated with age, gender, level of education and marriage status. The most common barrier for refractive correction was lack of perceived need for refraction and its correction. CONCLUSION: There is substantial unmet need for distance vision spectacles in this population. It is imperative that multi-component intervention be implemented to improve spectacle coverage in this rural north Indian setting.

Prevalence of blindness in India: A systematic review and meta-analysis.

Background: The National Programme for Control of Blindness and Visual Impairment modified the definition of blindness in 2017 in line with the internationally accepted definition. We did a systematic review and meta-analysis to compute pooled estimate of blindness in India among adults aged 50 years and above by using recent and old definitions of blindness. Methods: We retrieved population-based studies/surveys reporting the prevalence of blindness using recent (presenting vision <3/60 better eye) and previous (presenting vision <6/ 60 better eye) definitions in India during 1990-2017 from key search engines and grey literature. Two authors did an independent literature search and extracted relevant information. Pooled prevalence estimates were computed using Stata 12.0 by using the random effects model. Forest and funnel plots were generated. Stratification of results was also performed using two time periods: 1995-2005 and 2006-17. Results: A total of 18 published articles/reports were included for recent and 20 for previous definitions of blindness, involving 211 502 participants. The pooled prevalence (95% confidence interval [CI]) obtained for recent and previous definitions of blindness in India was found to be 6.11% (5.07%-7.14%) and 9.91% (8.57%-11.25%), respectively. The stratified pooled prevalence (95% CI) from rapid surveys was 4.81% (3.26%-6.35%) and 4.68% (2.91%-6.46%) for studies published during 1995-2005 and 2006-17, respectively, using the new definition. The corresponding figures for comprehensive surveys were 9.22% (95% CI 6.48%-11.96%) for the period 1995-2005 and 3.81% (95% CI 2.76%-4.84%) for the period 2006-17. Conclusion: There is a decrease in the prevalence of blindness in India using recent and previous definitions and a declining trend over time. High quantum of blindness remains an unfinished public health agenda for implementing programmes in larger populations to reduce its burden.