dear donna, of course this is not a joke; vision problems are annoying at the least and a serious danger at worst. although i can't tell you any scientific/medical stuff about this issue, here is my humble .02 worth (and about a few dollars' worth more). as one who is nearsighted and has astigmatism, i have spent much time in the office of my eye doctor over the years. if i mistakenly schedule an eye exam at a time in my monthly cycle when i am carrying a little extra water weight (a small amount hardly noticeable to me), my new contacts won't be "right" when they arrive because your eyes will have a little edema too (or this is what they tell me). so part of the time my vision is better than others because my eyes change from day to day but unfortunately the prescription is always the same. perhaps during breastfeeding your prescription for lenses would be different than if you were not lactating because of this or some other physical effect caused by the differing hormonal levels. so it seems quite likely that your vision might change "back" (or forward) after weaning. but the correct answer to the mother's specific question seems to me to be that by all means she should get new glasses that give her the best vision possible, because she should be planning to breastfeed for a long time. another common experience is that those who have vision problems find that they must get a new prescription every so often; my husband can wear his lenses for several years and my eyes seem to be changing more often than ever, i am now at less than a year for the necessary update. this mother may need to change her presciption after she weans, but she probably would have needed to do so anyway. this mother needs to be talking to a really good eye doctor. after all, she needs to see the beauty of her baby with crystal clear vision. carol b.