Mobile Phone Accessory Provides Inexpensive Vision Tests

Uncorrected refractive errors are the world's second-highest cause of blindness, affecting 2 percent of the world's population, according to the World Health Organization. so,what to do,especially in countries like india?

answer comes from MIT lab of USA in making our mobile phones as gadgets for diagnosis of refractory errors. no need to be screened by expensive tests. even remote rural population can be screened by this mobile application.