Subnormal best-corrected vision also after spectacle correction points towards the chance of amblyopia. Vision can be tested in children by several innovative pictures, letter acuity or symbol charts. It is treated in children as young as 2-3 year old. In a very young child, the strength of an eye to take up and control fixation is an indirect sign of the presence or absence of amblyopia. In children, the eye deviation, big fixation choice of one eye also indicates amblyopia.