Amblyopia

          Amblyopia is anuncorrectable decrease m yisionm one^rboth eves with no apparent structural abnormality^seen to explain it. It is a diagnosis of exclusion, meaning that whe a° decrease in vision is detected, other causes must be ruled out. Once no other cause is found, amblyopia is the diagnosis. Generally, a difference of two lines or more (on an eye-chart test of visual acuity) between the two eyes or a best corrected vision of 20/30 or worse would be defined as amblyopia. or ?0/40 if someone has 20/20 vision with the right eye and only 20 with the left, and the left eye cannot achieve better vision with corrective lenses, the left eye is said to be amblyopic.