How Amblyopia is commonly diagnosed?

Subnormal best corrected vision (even after spectacle correction) points towards the possibility of amblyopia. Vision can be tested in children by many innovative picture/letter acuity/symbol charts. It can be done in a child as young as 2-3 year old. In a very young child, the ability of an eye to take up and maintain fixation is an indirect sign of the presence or absence of amblyopia. In children with eye deviation, strong fixation preference of one eye indicates amblyopia.