The use of isotropic photorefraction for vision screening in infants.
Isotropic photorefraction is a technique which makes possible the rapid, economic, large scale screening of infants and young children for refractive errors. The relative size of blur circles reflected from the fundus in 3 flash photographs with different camera settings allows the size and direction of refractive errors to be estimated. The method has been validated against retinoscopic measures on a large group of infants. Findings of a high incidence of astigmatism in the first year are confirmed. Detection of hypermetropia in early infancy by this screening procedure may allow preventive treatment for accommodative strabismus.
D001251:Astigmatism / Q000453:epidemiology; D002675:Child, Preschool; D006801:Humans; D006956:Hyperopia / Q000453:epidemiology; D007223:Infant; D008403:Mass Screening / Q000295:instrumentation / Q000379:methods*; D009216:Myopia / Q000453:epidemiology; D009887:Ophthalmoscopy; D010781:Photography / Q000295:instrumentation / Q000379:methods; D012029:Refraction, Ocular; D012030:Refractive Errors / Q000453:epidemiology*