New Method of Screening Young Children for Defects in Visual AcuityBr Med J 1968; 4 doi: https://doi.org/10.1136/bmj.4.5624.157 (Published 19 October 1968) Cite this as: Br Med J 1968;4:157
- Allan Withnell,
- 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