HS Dua, DG Said, AM Otri - British Journal of Ophthalmology, 2009 - bjo.bmj.com The World Health Organization (WHO) defines blindness as a visual acuity of less
than 3/60, or corresponding visual-field loss to less than 10°, in the better
eye with best possible correction. In 2002, according to WHO estimates, ... Related articles - All 3 versions
TH Sach, AJE Foss, RM Gregson, A Zaman, F … - Eye, 2009 - nature.com A cost-utility analysis was undertaken alongside a randomized controlled trial
of second-eye cataract surgery in secondary care ophthalmology clinics. A total
of 239 women over 70 years old with one unoperated cataract were randomized ... Related articles - All 3 versions