answer:I have never heard of this, but, I also havn’t been pregnant for 24 years. lol If you already have a need for corrective lenses I guess it wouldn;t hurt to follow your docs advice now. After all, you still have too SEE until the baby is born. haha I was textbook, couldn’t read small print right at 40. Maybe even the day I turned. ;-) What I CAN tell you is, good luck trying to watch your birthing in the overhead mirrors. Really hard to keep your eyes wide open during a contraction. You just naturally squinch up your face. I was pissed off that I only got a couple glimpses of my daughter, then..I didn’t care anymore, just get this baby out! haha