my dd has worn glasses since she was 18 months old, her sight is very poor and she has a squint on the left. it was quite scary as one day, her left eye was turned in all of a sudden, she's worn glasses ever since. we went to the hospital and were told after her first sight test there, she has very bad eyesight, she's been doing a lot of work in order to see, she'll need glasses and they'll have very strong lenses in them.
i was devastated and cried all the way to the opticians with the prescription, but now, we're so used to seeing her in them, she looks odd without iykwim.
if your dd does have a lazy eye, it is best to get it checked out asap, a lot can be done early on to correct it, if left, it will only get worse.
have a look on my profile, there's a pic of dd in her glasses, and wearing her patch, which we're doing 2 hours a day atm