Prevalence and Causes of Avoidable Blindness in Subjects Over 50 Years of Age in Honduras
Purpose: To describe the prevalence and causes of avoidable blindness in people aged 50 and over in the areas of influence of doctors in social service during the years 2018–2019.
Methods: This observational, descriptive, cross-sectional study, with analysis of association of variables, was conducted on patients 50 years and older at the national level, selected under simple random sampling, where sociodemographic variables, background, and clinical characteristics were studied. An ophthalmological clinical examination was performed with prior informed consent, and the information was processed and analyzed using Epi Info 7.2 statistical package and SPSS version 25.
Results: Overall, 7992 people were evaluated, with a mean age of 62 years; 60.8% (4861) were women and 39.2% (3131) were men. The prevalence of blindness for both eyes was 4.5% (356/7992, 95% CI: 4.1–5.1%, p < 0.001). The prevalence of severe and moderate visual impairment was 1.5% (118/127) and 12.9% (1029)/12.6% (1004) for the right and left eyes, respectively. The main causes of blindness were cataract, refractive error, and glaucoma.
Conclusion: The prevalence of avoidable blindness found in the study was higher than expected and the respective causes were consistent with previous studies. Consequently, it is recommended to implement health policies aimed at the prevention and management of avoidable blindness.
Blindness, Cataract, Honduras, Prevalence
1. Silva, JC, Mújica, OJ, Vega, E., Barceló, A., Lansingh, VC, Mcleod J, et al. A comparative evaluation of avoidable blindness and visual impairment in seven Latin American countries: prevalence, coverage and inequalities. Rev Panam Public Health 2015;37:13–20.
2. WHO. Global data on visual impairments 2010. WHO; 2012. Available from: https://www.who.int/blindness/ GLOBALDATAFINALforweb.pdf
3. Pascolini D, Mariotti SP. Global estimates of visual impairment: 2010. Br J Ophthalmol 2012;96:614–618.
4. Flaxman SR, Bourne RR, Resnikoff S, Ackland P, Braithwaite T, Cicinelli MV, et al. Global causes of blindness and distance vision impairment 1990–2020: a systematic review and meta-analysis. Lancet Glob Health 2017;5:e1221–e1234.
5. Foster A, Resnikoff S. The impact of Vision 2020 on global blindness. Eye 2005;19:1133.
6. Alvarado D, Rivera B, Lagos L, Ochoa M, Starkman I, Castillo M, et al. National survey of avoidable blindness and visual impairment in Honduras. Rev Panam Salud Publica 2014;36:300–305.
7. Patil S, Gogate P, Vora S, Ainapure S, Hingane RN, Kulkarni AN, et al. Prevalence, causes of blindness, visual impairment and cataract surgical services in Sindhudurg district on the western coastal strip of India. Indian J Ophthalmol 2014;62:240.
8. Thapa R, Bajimaya S, Paudyal G, Khanal S, Tan S, Thapa SS, et al. Prevalence and causes of low vision and blindness in an elderly population in Nepal: the Bhaktapur retina study. BMC Ophthalmol 2018;18:42.
9. Kocur I, Resnikoff S. Visual impairment and blindness in Europe and their prevention. Br J Ophthalmol 2002;86:716–722.
10. Rahi JS, Cable N, British Childhood Visual Impairment Study Group. Severe visual impairment and blindness in children in the UK. The Lancet 2003;362:1359–1365.
11. Naidoo KS, Leasher J, Bourne RR, Flaxman SR, Jonas JB, Keeffe J, et al. Global vision impairment and blindness due to uncorrected refractive error, 1990–2010. Optom Vis Sci 2016;93:227–234.
12. Chakravarthy U, Biundo E, Saka RO, Fasser C, Bourne R, Little JA. The economic impact of blindness in Europe. Ophthalmic Epidemiol 2017;24:239–247.
13. Bastawrous A, Rono HK, Livingstone IA, Weiss HA, Jordan S, Kuper H, et al. Development and validation of a smartphone-based visual acuity test (peek acuity) for clinical practice and community-based fieldwork. JAMA Ophthalmol 2015;133:930–937.
14. Bourne RR, Flaxman SR, Braithwaite T, Cicinelli MV, Das A, Jonas JB, et al. Magnitude, temporal trends, and projections of the global prevalence of blindness and distance and near vision impairment: a systematic review and meta-analysis. Lancet Glob Health 2017;5:e888– e897.
15. Resnikoff S, Pascolini D, Mariotti SP, Pokharel GP. Global magnitude of visual impairment caused by uncorrected refractive errors in 2004. Bull World Health 2008;86:63– 70.
16. Ko F, Vitale S, Chou CF, Cotch MF, Saaddine J, Friedman DS. Prevalence of nonrefractive visual impairment in US adults and associated risk factors, 1999-2002 and 2005- 2008. JAMA 2012;308:2361–2368.
17. Khairallah M, Kahloun R, Bourne R, Limburg H, Flaxman SR, Jonas JB, et al. Number of people blind or visually impaired by cataract worldwide and in world regions, 1990 to 2010. Invest Ophthalmol Vis Sci 2015;56:6762– 6769.
18. Limburg H, von-Bischhoffshausen FB, Gomez P, Silva JC, Foster A. Review of recent surveys on blindness and visual impairment in Latin America. Br J Ophthalmol 2008;9 :315–319.
19. Leasher JL, Bourne RR, Flaxman SR, Jonas JB, Keeffe J, Naidoo K, et al. Global estimates on the number of people blind or visually impaired by diabetic retinopathy: a meta-analysis from 1990 to 2010. Diabetes Care 2016;39:1643–1649.
20. Duerksen R, Limburg H, Lansingh VC, Silva, JC. Review of blindness and visual impairment in Paraguay: changes between 1999 and 2011. Ophthalmic Epidemiol 2013;20:301–307.
21. Bastawrous A, Dean WH, Sherwin JC. Blindness and visual impairment due to age-related cataract in sub- Saharan Africa: a systematic review of recent population-based studies. Br J Ophthalmol 2013;97:1237–1243.
22. Rao GN, Khanna R, Payal A. The global burden of cataract. Curr Opin Ophthalmol 2011;22:4–9.