RT Journal Article SR Electronic T1 Screening for refractive errors in 6-9 month old infants by photorefraction. JF British Journal of Ophthalmology JO Br J Ophthalmol FD BMJ Publishing Group Ltd. SP 105 OP 112 DO 10.1136/bjo.68.2.105 VO 68 IS 2 A1 J. Atkinson A1 O. J. Braddick A1 K. Durden A1 P. G. Watson A1 S. Atkinson YR 1984 UL http://bjo.bmj.com/content/68/2/105.abstract AB The method of isotropic photorefraction has been used in a trial of refractive screening of 6-9 month old infants. Data are presented on the calibration of the method against retinoscopic measurements and its reliability. In photorefractive screening of 1096 infants under cyclopentolate cycloplegia 5% were found to be hypermetropic (over +3.5 D), 4.5% myopic, and 1.3% anisometropic (over 1 D). These refractive errors were confirmed on retinoscopic follow-up (with the exception of a few anisometropes). Follow-up of controls shows that one small refractive error was missed in 52 infants. We conclude that photorefraction is a valid and practical screening technique. Longitudinal study of infants with refractive errors will assess the value of early detection, in particular for prediction and prevention of strabismus.