Impact of a mobile unit on access to eye care in São Paulo, Brazil.

PURPOSE: The goal of this study was to determine the impact of a mobile eye health unit on access to eye care and to generate a profile of the population requiring ophthalmic care by age, nature of their ophthalmic diseases, and optimal management. METHODS: The study was conducted in 14 cities in the southwest region of São Paulo, Brazil. Subjects included individuals who participate in the Brazilian Unified Health System who were in need of eye care. There were no restrictions on age, gender or socioeconomic status. Data was transferred to an Excel table for statistical analyses. RESULTS: We evaluated 6,878 participants in this survey with mean age of 44 years (range 4 months to 96 years); 65.5% were female. Among the diagnoses, 78.6% presented with refractive errors, 9.6% presented with cataracts and 8.3% presented with pterygium. New corrective lenses were prescribed for 60.9% of the participants; 10% retained their existing lenses, ~28% required counseling only and18.1% of the participants were referred to a tertiary facility for specialized exams and/or surgical procedures. Of the participants who required outside referrals, 36.4% required oculoplastic/external eye surgery and 31.8% required cataract surgery. CONCLUSION: The vast majority of patients presenting to a mobile eye health unit required prescriptions for corrective lenses. The rate of detection of ocular disorders was relatively high and the mobile unit provided effective treatment of refractive errors and referrals for specialized ophthalmic examinations and procedures. A mobile eye health unit can be an effective alternative method for improving access to basic eye care, for promoting eye health education and preventing blindness.

Magnitude of visual impairment, blindness and causes in the southwest region of São Paulo state, Brazil / Importância da deficiência visual, cegueira e causas na região sudoeste do estado de São Paulo, Brasil

ABSTRACT Purposes: The purpose of this study was to evaluate the magnitude and determinants of bilateral blindness and visual impairment (VI) in the southwest region of São Paulo State, Brazil. Methods: This cross-sectional study conducted during 2013 and 2014 targeted people of all ages in 10 districts in the southwest region of São Paulo State, Brazil. Ophthalmologists in a mobile unit measured visual acuity and examined eyes. Visual acuity was categorized according to the World Health Organization sex-adjusted rates with 95% confidence intervals (CI) were calculated. Number of blindness and visually impaired was projected for the entire study area. Results: We examined 2,306 participants. The age- and sex-adjusted frequency of bilateral blindness was 0.26% (95% CI: 0.1-0.4). Females (0.35%) and patients 350 years old (0.58%) had higher rate of blindness compared with males and younger individuals. The rate of severe VI was 9.1% (95% CI: 8.8-10.6) and was higher among males (11.6%) and those 350 years (12.3%). There could be 880 people with bilateral SVI in the study area. Bilateral severe VI was attributed to cataracts in 63% and was attributed to refractive error in 18%. Conclusion: Visual impairment and blindness in the study population was low and mainly due to cataract and refractive errors. Initiatives should be addressed by health care services to further reduce avoidable blindness in the region.

RESUMO Objetivos: O objetivo deste estudo foi avaliar a mag­nitude e determinantes da cegueira bilateral e deficiência visual (DV) na região sudoeste do estado de São Paulo, Brasil. Métodos: Trata-se de um estudo transversal do qual participaram pessoas de todas as idades, habitantes de 10 distritos da região sudoeste do estado de São Paulo - Brasil, nos anos de 2013-2014. Oftalmologistas avaliaram a acuidade visual e realizaram exame oftalmológico usando uma unidade móvel. A acuidade visual foi categorizada seguindo os critérios da Organização Mundial de Saúde. Foi calculada a taxa ajustada por idade-sexo e o intervalo de confiança de 95% para estimar o número de cegos e deficientes visuais na população. Resultados: Foram examinadas 2.306 pessoas. A frequência de cegueira bilateral ajustada por idade e sexo foi de 0,26% (95% CI: 0,1-0,4). Mulheres (0,35%) e indivíduos 350 anos (0,58%) foram os que tiveram maior taxa de cegueira. A taxa de deficiência visual grave foi de 9,1% (95% CI: 8,8-10,6), ocorrendo mais em homens (11,6%), com idade 350 anos (12,3%). Estimativas indicaram existência de 880 pessoas com deficiência visual grave bilateral na região. Catarata (63%) e erros refrativos (18%) foram as prin­cipais causas de deficiência visual grave. Conclusão: Deficiência visual grave e cegueira na região estudada foram baixas, sendo as causas mais frequentes a catarata e os erros de refração. Os serviços de saúde precisam implementar iniciativas para reduzir as causas evitáveis de cegueira na região.

Magnitude of visual impairment, blindness and causes in the southwest region of São Paulo state, Brazil.

PURPOSES: The purpose of this study was to evaluate the magnitude and determinants of bilateral blindness and visual impairment (VI) in the southwest region of São Paulo State, Brazil. METHODS: This cross-sectional study conducted during 2013 and 2014 targeted people of all ages in 10 districts in the southwest region of São Paulo State, Brazil. Ophthalmologists in a mobile unit measured visual acuity and examined eyes. Visual acuity was categorized according to the World Health Organization sex-adjusted rates with 95% confidence intervals (CI) were calculated. Number of blindness and visually impaired was projected for the entire study area. RESULTS: We examined 2,306 participants. The age- and sex-adjusted frequency of bilateral blindness was 0.26% (95% CI: 0.1-0.4). Females (0.35%) and patients 350 years old (0.58%) had higher rate of blindness compared with males and younger individuals. The rate of severe VI was 9.1% (95% CI: 8.8-10.6) and was higher among males (11.6%) and those 350 years (12.3%). There could be 880 people with bilateral SVI in the study area. Bilateral severe VI was attributed to cataracts in 63% and was attributed to refractive error in 18%. CONCLUSION: Visual impairment and blindness in the study population was low and mainly due to cataract and refractive errors. Initiatives should be addressed by health care services to further reduce avoidable blindness in the region.