In 2016, Harvard TH Chan School of Public Health in collaboration with Sankara Eye Hospital based in Bangalore, India, conducted a pilot study to compare the accuracy and ease of use of several lightweight, mobile eyesight assessment devices. The aim of the study was to select a low-cost handheld autorefractor that can be used in household surveys to test the visual acuity of the older people in India.

The dataset for this study is available on this website for public use.