Tag: VisionSpring

Effect of providing near glasses on productivity among rural Indian tea workers with presbyopia (PROSPER): a randomised trial

A trial of Indian tea pickers, has shown that the provision of glasses improved their productivity by 21.7 per cent – and for those aged over 50 the increase was 31.6 per cent. This represents the largest ever recorded productivity increase from any health intervention. The PROSPER [PROductivity Study of Presbyopia Elimination in Rural-dwellers] trial, is the…