my DD got her glasses just before she turned two due to her long sightness and turned in eye. biggest tip is to don't get the cheapest frames to spend a little extra for good quality frames, we brought DD frames that are bendy that can be bent in ways little ones do when they get their hands on them and it doesnt break them (they are around 350 dollars if i remember right) that has saved us alot.
Also the first few days when she wears them keep her busy so she doesn't think about them to much and more likely to take them off, we kept DD busy the first couple days and we actually had no problem with her taking them off i think she loved the fact she could actually see properly!!
Just make sure you have a chat to the people at creche they will look out for them especially knowing she is only starting to wear them, my DD was fine with hers at child care they took it off her and put them up high at nap time.
hope she can avoid the op, my DD had 3 years of the glasses before her op she had it last year on both her eyes not very pleasant at all