Pandemic restrictions, due to which children did not go to school and often not even to play with friends, also contributed to the deterioration of their eyesight. The lack of sunshine caused greater myopia in children observed for several months last year in Argentina and China. This follows from two scientific studies reported today by the daily El País. "When children don't go out and have enough sunlight, the retina does not produce dopamine, which contributes to myopia," said Argentine pediatric ophthalmologist Carolina Picotti, lead author of a study published in the scientific journal The Lancet. To stop the progression of myopia, children should be in the sunlight for at least two hours a day. David Musch, a professor at the University of Michigan, reached a similar conclusion in a study published in the professional medical server JAMA Network.