[jk7tarYZAQNpTQa]

> Parents nowadays blame screens for short-sightedness, but the truth is back then my classmates are almost all doing reading and writing all the time, and nobody was using screens (Symbian Nokia only took off years later).

Classic (i.e. in paper) reading/writing is much worse than screens.

> It's only me and the other two boys who spend all the time and money on online video games

the most important factor, AFAIK, is "outside time", i.e. the amount of "medium/far distance looking" that you do every day. A lack of it has been proven to cause myopia.

https://pubmed.ncbi.nlm.nih.gov/34142457/