Amblyopia "blunt vision" also called lazy eye, is a disorder of sight. It results in decreased vision in an eye that otherwise appears normal, or out of proportion to associated structural problems of the eye. Whenever the brain does not receive visual signals from an eye for a long period of time, there is a risk of amblyopia. It also can occur when the brain "turns off" the visual processing of one eye to prevent double-vision, for example in strabismus (crossed eyes). The earlier it is detected, and the underlying cause corrected with glasses or surgery, the better the long term outcomes. This disorder has been estimated to affect 1–5% of the population. It often occurs duri
The distribution of the 35,936 VATs performed in 13,471 children from 1989 to 1996. There was a high percentage of VATs performed in relation to the number of registered children (93.5%). Of the total screened children, 76.42% underwent the VAT twice or more. The distribution of the 35,936 VATs performed in 13,471 children from 1989 to 1996 Seven hundred forty seven children (5.5%) were untestable. The total number of students undergoing 2 m retinoscopy was 3,467 (25.8%) among whom 112 (3.2%) were referred to a complete examination. Among the 1,966 children referred to an ophthalmologic examination, 894 (45.5%) showed refractive errors or ocular disorders. shows the frequency of the most common eye diseases in the examined population.