I agree with everyone else. Zachary (now 4) has had prescription glasses since he was 4 months old. We purchase the glasses through the doctor and then buy him sunglasses from Wal-Mart for $5.00. I have about 5 pair of sunglasses since so I can be sure that he has a pair at school, in my purse etc....
This past September, I did purchase transition glasses and I am VERY disappointed. They don't darken fast enough and hardly ever get dark enough for him. He is photophobic--but I would say a mild case--he can actually tolerate the sun fairly well. I only really see them transition on cloudy days to the degree where he can wear them. On sunny, bright days, he needs those sunglasses from Wal-Mart. Also, the sun comes in through the side of his transitions and he complains about that. The Wal-Mart sunglasses cover the sides of his face and actually protect him much better.
Yes, I do switch glasses (when we get inside I take off the sunglasses and put on his regular glasses), but he does that on his own COMPLETELY at school. I bought him a race car glass case and keep it in the same place in his backpack. When he gets to school, he switches them out. When he goes out for recess, he does the routine. Also, his teacher is very good about taking his sunglasses/glasses on field trips so we never have a problem there. His transitions also came with a set of clip ons (much darker), but is doesn't solve the sun coming in on the side--so we don't use them.
The transitions cost me about 100.00 and my insurance paid for the frames and lens. I am still deciding if I want transitions again next time he gets new lenses--probably not if the price goes up.
I have told the doctor this is what I do and he has never said anything about it---he says OK. In my opinion, they are a waste of money.
Jo