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Datasets for the published papers all draw on the autorefraction (refractive error) and/or visual acuity measurements, information on reasons for being unable to perform the ophthalmic tests, and self-report data on eye illnesses and surgery, as described, below. These data provide the outcome variables for the papers and may be of interest to other researchers. Definition of outcomes is given in the published papers and generation of the relevant derived outcome variables are specified in the analytical program files. The analytical datasets also include variables related to demographic and environmental factors and information on exclusions related to withdrawals. Each paper, and related program .do file, give full details of exclusions relating to the specific research question. Each analytical dataset can be used to generate the main results of the paper.