Effect of randomization group and other potential determinants on observed wear of glasses at endline examination among children needing glasses (Secondary study outcome),...

BackgroundOffering free glasses can be important to increase children’s wear. We sought to assess whether “Upgrade glasses” could avoid reduced glasses sales when offering free...

Values are numbers (percentages) unless stated otherwise.

Effect of randomization group and other potential determinants on purchase of glasses prior to endline (main study outcome) adjusting for cluster effects within school.