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. 2021 Feb 16;9(4):e489–e551. doi: 10.1016/S2214-109X(20)30488-5

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© 2021 The Author(s). Published by Elsevier Ltd. This is an Open Access article under the CC BY 4.0 license

This is an open access article under the CC BY license (http://creativecommons.org/licenses/by/4.0/).

PMC Copyright notice

Heatmap of the world, showing the countries with the least to the most recent population-based eye health surveys. Countries are coloured differently depending on how recently the last survey was done. Some countries have done no such surveys. — Most recent population-based eye health surveys globally

All surveys (rapid and comprehensive, national or subnational) done since 2000. Not applicable indicates that no surveys were done. Data from VLEG–GBD,¹ and the Rapid Assessment of Avoidable Blindness Repository.