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Sivaprasad, S; Gupta, B; Crosby-Nwaobi, R; Evans, J; (2012) Prevalence of Diabetic Retinopathy in Various Ethnic Groups: A Worldwide Perspective. Survey of ophthalmology, 57 (4). pp. 347-370. ISSN 0039-6257 DOI: https://doi.org/10.1016/j.survophthal.2012.01.004 Full text not available from this repository.

Ezelum, C; Razavi, H; Sivasubramaniam, S; Gilbert, CE; Murthy, GVS; Entekume, G; Abubakar, T; Nigeria Natl Blindness, V; (2011) Refractive Error in Nigerian Adults: Prevalence, Type, and Spectacle Coverage. Investigative ophthalmology & visual science, 52 (8). pp. 5449-5456. ISSN 0146-0404 DOI: https://doi.org/10.1167/iovs.10-6770

Evans, JR; Fletcher, AE; Wormald, RPL; Ng, ESW; Stirling, S; Smeeth, L; Breeze, E; Bulpitt, CJ; Nunes, M; Jones, D; +1 more... Tulloch, A; (2002) Prevalence of visual impairment in people aged 75 years and older in Britain: results from the MRC trial of assessment and management of older people in the community. The British journal of ophthalmology, 86 (7). pp. 795-800. ISSN 0007-1161 DOI: https://doi.org/10.1136/bjo.86.7.795 Full text not available from this repository.