I have the worst eye sight of all of my friends and most of my family (except my grandma). I've been wearing glasses since I was 12 and they got really bad really quickly from 14-16. The decline is steady now, and actually the last time I went to the opticians she said the prescription she was coming out with was weaker than my current glasses :???: A one-off, I think! They don't feel like they've improved! I don't know the exact number of my prescription but I do have to lean forward towards my screen a bit to read my words on the monitor if I look without my glasses.
I used to say I wish I didn't have to wear them, and for the sake of my eye sight, I wish I didn't but I'm glad I wear glasses as they make me look much better! I look weird without my glasses, another reason I'll probably never wear contacts.