Wow, we've got a lot of young kids with glasses on here!!
My guys have been wearing glasses since 4 and 3. JP needed his all the time, but his father and my mother weren't convinced, so when he broke them, they refused to replace them. He's been back in glasses now for two years (he's 8), with a much stronger prescription, a serious tongue lashing from the ophthalmologist, and a great big fat "I told you." from me.
Devin got his first pair of glasses just after his third birthday. He's farsighted and has a severe astigmatism along with photosensitivity. The first year was a true struggle with him, I suspected then (still do) that the prescription wasn't quite right. But, once he got his new prescription last year, he doesn't want to take his glasses off. He knows that he can see. Some days he will forget to put them on, so we remind him he needs to wear his "eye medicine." It's a concept that he can understand. Medicine makes me better, therefore eye medicine makes my eyes better.
I will suggest that you not pay a lot for glasses. Kids are rough on them. Both of my boys broke two pairs of glasses in the first year. Devin broke his two several times over. Last time we bought glasses, we went to Wal*Mart and got three pairs, one of which is sunglasses for less than $200. My one pair costs $100 more than his three.
