astro, pediaoptix cant explain much. Cause they are only optiction. Must see eye specialist. I am seeing dr pauline cheong. She is a qualified pediatric eye dr. She said it is in born. Thou some may have genetic. But nowadays, alot of things still can happen.
Every babies are born with long sighted. Infact up to 1000degree. It goes down very fast when they grow up. By 1yo, it should go down to 300, now sam is 325, almost perfect. Bel never go down, infact the degree got worst! So, it become like this, and due to using too must straining on the eyes, it develop lazy eyes. She is still very good, cause she pass all development test. Only the eyes never work harder as normal. This usually occur in smaller eyes children.