His sight was about to lose.

The way he plays the electronic hand in the dark, he will lose sight and will have a chance to go blind if he plays often and for a long time. If he will play, he should play while turning on the light as a person. This is very annoying because the short-sightedness will suffer because he has to wear glasses and go to LASIK to get it back to normal, and if not, he has to go to an optometrist every year. You have to try to wear contact lenses or you have to wear your eyes forever, but it’s better to do LASIK.