while my eyes didn't change during pg, I used to wear both the extended 30 day contacts and glasses. Sometime around the time of falling pg (maybe during the year before) I was swapped to the daily lenses by my eye specialist. During labour, I went in wearing glasses (didn't want to have to worry about contacts and removing them as I wasn't sure how long it'd take) and ended up removing them and not really seeing much for most of the last 3 hours - didn't bother me. Actually I think it actually helped - I couldn't see the clock to worry about how long I'd been there for. I'm very short sighted (can't see the lines on my hands unless their nearing at my nose type of short sighted )