Patient: When my daughter was about 1 year old, she noticed that one of her eyes was slightly slanted outward, especially when she looked at the distance. I would like to ask if this phenomenon can be treated with glasses, he is still so young, with no how to do? The first hospital of Hebei Medical University ophthalmology Zhao Yantao: 4 years old is the best treatment period, should be consulted as soon as possible, check the trigeminal degree (strabismus degree) and binocular visual function, if the trigeminal degree more than 15 degrees is an indication for surgery. Surgery should be performed as soon as possible, so that the best treatment period is not delayed. Patient: His vision is fine, except that one eye is a little outwardly slanted. Zhao Yantao, Ophthalmology Department of the First Hospital of Hebei Medical University: Binocular vision refers to the binocular stereo vision function, if long-term strabismus is not corrected, it will destroy the binocular vision function. In contrast, adult strabismus surgery only solves cosmetic problems, corrects eye position, and cannot restore stereo vision.