Amblyopia (lazy eye) is an eye condition in which one eye has less vision than the other or both eyes have less vision than normal limits although there is no structural disorder with the eye or the optic nerve. Vision is learnt starting from birth. Our vision develops as long as the brain develops and we learn to see in a more detailed way. If a condition arises during this period which hinders vision, for example if the diopter of one eye becomes higher than the other, that eye learns to have a more blurred vision and becomes lazy.
Causes of amblyopia