Visual acuity of school entrants

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Abstract
A study of 4239 school entrants showed that 3.4% had less than normal or near normal distant vision and 0.8% had near vision impairment. The group requiring specialist advice and care, i.e., those with 6/12 or worse vision in either eye, were further investigated. The effectiveness of preschool examinations in the early detection of vision defects could be assessed. During the preschool period 2/3 of the children with visual impairment may go undetected. When the diagnosis was made, the children were ususally between 3 and 5 yr of age. In general, attendance at child health clinics for developmental surveillance was not a significant factor. Given that maturation has an effect, the difficulty seems to be the lack of suitable techniques rather than expertise. Apparently, the whole area of vision testing during the preschool period needs to be reviewed.

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