References
- Flaxman SR, Bourne RRA, Resnikoff S, et al. Global causes of blindness and distance vision impairment 1990-2020: a systematic review and meta-analysis. Lancet Glob Health. 2017;5(12):e1221–e1234.
- Broman AT, Munoz B, Rodriguez J, et al. The impact of visual impairment and eye disease on vision-related quality of life in a Mexican-American population: proyecto VER. Invest Ophthalmol Vis Sci. 2002;43(11):3393–3398.
- Langelaan M, De Boer MR, Van Nispen RM, Wouters B, Moll AC, Van Rens GH. Impact of visual impairment on quality of life: a comparison with quality of life in the general population and with other chronic conditions. Ophthalmic Epidemiol. 2007;14:119–126.
- Smith TS, Frick KD, Holden BA, Fricke TR, Naidoo KS. Potential lost productivity resulting from the global burden of uncorrected refractive error. Bull World Health Organ. 2009;87:431–437.
- Cruess AF, Gordon KD, Bellan L, Mitchell S, Pezzullo ML. The cost of vision loss in Canada. 2. Results. Can J Ophthalmol. 2011;46:315–318.
- Daum KM, Clore KA, Simms SS, et al. Productivity associated with visual status of computer users. Optometry. 2004;75(1):33–47.
- Naidoo KS, Wallace DB, Holden BA, Minto H, Faal HB, Dube P. The challenge of uncorrected refractive error: driving the agenda of the Durban Declaration on refractive error and service development. Clin Exp Optom. 2010;93:131–136.
- Nangia V, Jonas JB, Sinha A, Gupta R, Agarwal S. Visual acuity and associated factors. the central india eye and medical study. PLoS One. 2011;6:e22756.
- Chandra SR. Global blindness: VISION 2020: the right to sight. Arch Ophthalmol. 2008;126:1457.
- Ramke J, du Toit R, Palagyi A, et al., Public sector refraction and spectacle dispensing in low-resource countries of the Western Pacific. Clin Exp Ophthalmol. 2008;36:339–347.
- Fricke TR, Holden BA, Wilson DA, et al. Global cost of correcting vision impairment from uncorrected refractive error. Bull World Health Organ. 2012;90(10):728–738.
- Ramke J. du Toit R, Palagyi A, Brian G, Naduvilath T. Correction of refractive error and presbyopia in Timor-Leste. Br J Ophthalmol. 2007;91:860–866.
- Kovai V, Krishnaiah S, Shamanna BR, Thomas R, Rao GN. Barriers to accessing eye care services among visually impaired populations in rural Andhra Pradesh, South India. Indian J Ophthalmol. 2007;55:365–371.
- Zhang M, Zhang R, He M, et al. Self correction of refractive error among young people in rural China: results of cross sectional investigation. BMJ. 2011;343:d4767.
- Ilechie AA, Abokyi S, Owusu-Ansah A, Boadi-Kusi SB, Denkyira AK, Abraham CH. Self-refraction accuracy with adjustable spectacles among children in Ghana. Optom Vis Sci. 2015;92:456–463.
- He M, Congdon N, MacKenzie G, Zeng Y, Silver JD, Ellwein L. The child self-refraction study results from urban Chinese children in Guangzhou. Ophthalmology. 2011;118:1162–1169.
- Zeng Y, Keay L, He M, et al. A randomized, clinical trial evaluating ready-made and custom spectacles delivered via a school-based screening program in China. Ophthalmology. 2009;116(10):1839–1845.
- Keay L, Gandhi M, Brady C, et al. A randomized clinical trial to evaluate ready-made spectacles in an adult population in India. Int J Epidemiol. 2010;39(3):877–888.
- Brady CJ, Villanti AC, Gandhi M, Friedman DS, Keay L. Visual function after correction of distance refractive error with ready-made and custom spectacles: a randomized clinical trial. Ophthalmology. 2012;119:2014–2020.
- Huang J, Huang J, Chen Y, Ying GS. Evaluation of approaches to analyzing continuous correlated eye data when sample size is small. Ophthalmic Epidemiol. 2018;25:45–54.
- Zhou Z, Chen T, Jin L, et al. Self-refraction, ready-made glasses and quality of life among rural myopic Chinese children: a non-inferiority randomized trial. Acta Ophthalmol. 2017;95(6):567–575.
- Shane TS, Knight O, Shi W, Schiffman JC, Alfonso EC, Lee RK. Treating uncorrected refractive error in adults in the developing world with autorefractors and ready-made spectacles. Clin Exp Ophthalmol. 2011;39:729–733.
- Ramke J, du Toit R, Brian G. An assessment of recycled spectacles donated to a developing country. Clin Exp Ophthalmol. 2006;34:671–676.
- Wilson DA, Cronje S, Frick K, Holden BA. Real cost of recycled spectacles. Optom Vis Sci. 2012;89:304–309.
- Shane TS, Shi W, Schiffman JC, Lee RK. Used glasses versus ready-made spectacles for the treatment of refractive error. Ophthalmic Surg Lasers Imaging. 2012;43:235–240.
- Pearce MG, Pearce N. Addressing refractive error visual impairment: volunteer organisations’ alignment with Vision 2020 and public health principles. Clin Exp Optom. 2012;95:583–589.