This was my gut reaction too: no shit your performance increases if you use glasses when you need glasses! This is a finding on par with "giving food to hungry

This was my gut reaction too: no shit your performance increases if you use glasses when you need glasses! This is a finding on par with "giving food to hungry kids improves wellbeing" Also, when you dont need to know prescription strength judged to 0.1 diopter accuracy, & ignore stuff like cilinder correction, a vision test is super cheap to perform, right? Then, even supplying 5$ plastic glasses from the bargain bin would be a dramatic quality of life improvement for afflicted kids. I share your feeling of shock.