C.V.
Ambyopia is a condition that is easily treated in young children with glasses. And that's exactly what your opthalmologist is doing. The earlier it is treated, the better and more successful the correction.
I agree with Michelle, at that age you'll need to use a glasses strap. The optricians can assist you in getting everything you need to keep those glasses on your boy. :-)
I doubt that his vision problems are affecting his behavior. Toddler boys are tornadoes of energy, broken toys and toppled over furniture. It's just the way most of them are.