Actually, Near sightedness is SO common, that I would EXPECT most of you to have it. BTW when I was a kid, I probably did more reading than ANYONE!! !! ! I had insomnia and sometimes would read through the night! I didn't have ANY problems until about about 27 years later, and THEN I just had astigmatism. About 3-4 years ago I became FAR sighted! So ****NOPE**** reading does NOT cause near sightedness. I used to read ALL the time and some writing was fuzzy and small. ICs in the 60s-70s were not NEARLY as clearly marked as they are today.
Steve