A. Villalobos

Effective refractive error coverage in adults aged 50 years and older: estimates from population-based surveys in 61 countries.

Tueng T. Shen, Anthea M Burnett, N. Congdon, 2022, The Lancet. Global health.

Effective cataract surgical coverage in adults aged 50 years and older: estimates from population-based surveys in 55 countries.

Anthea M Burnett, Thulasiraj D Ravilla, H. Limburg, 2022, The Lancet. Global health.

Prevalence of visual impairment in El Salvador: inequalities in educational level and occupational status.

J. Leasher, V. Lansingh, D. Moriña, 2014, Revista panamericana de salud publica = Pan American journal of public health.