I on other hand have always been blessed in my eyesight. At 77 can still drive short distances without glasses, tho put them on for longer journeys or get strain [it's ok - I can do the 20 yd numberplate test]; & only wear my reading glasses for longer reads - as optician said to me a while back, 'You don't need them for a menu, but you'd better put them on for a whole book.' Didn't wear any till well into 40s. So it can't just be down to reading. Nor hereditary — both my parents lifelong spectacle-wearers.