Surgeons per million population in 2011 and 2020 (projected). Complete national workforce entry and exit data needed to make year 2020 projections were limited and differed by cadre. Whereas 2011 ratios could be calculated for surgeons and ophthalmic clinical officers (OCOs)/nurses in 21 countries, and in 18 countries for refractionists, year 2020 ratios could only be calculated in 14 countries for surgeons, 15 for OCOs/nurses, and 7 for refractionists (16 countries in total contributed data for analysis of at least one cadre). Year 2020 cataract surgery rate projections were limited to the countries for which surgeon projections could be made. Data for 2011 are only presented here for countries in which projections could be made.