Papers And Originals

New Method of Screening Young Children for Defects in Visual Acuity

Br Med J 1968; 4 doi: (Published 19 October 1968) Cite this as: Br Med J 1968;4:157
  1. Allan Withnell,
  2. H. E. Wilson


    The methods used at present for screening young children's vision have disadvantages, such as that the child's intelligence can affect the result. In a new method three white cards are used; these are printed with one, two, or three black blocks arranged so that if a child can correctly state the number of blocks at 6 metres the visual acuity is at least 6/9. When tested on 186 children the new method gave better results than conventional tests; eight children with defective vision were picked up only by the new method and none were missed.


    • * Patent pending