Abstract

Recently, this laboratory has measured the development of binocular visual acuity in human infants from birth to one year of age using a new and efficient electrophysiological technique (Norcia and Tyler, 1985a). From a large sample of infants (N = 197) it was found that the logarithm of acuity increased linearly with age at about 0.25 octaves per month from 4.5 c/deg just after birth to 20 c/deg at 8 months postnatal age. In a separate analysis, Norcia and Tyler (1985b) established that the technique has an intra-session reliability of +0.2 octaves in the 17 to 25 week age range. While these data establish age norms and an estimate of reliability for binocular acuity, it is of importance for clinical studies to obtain similar data for monocular acuities and norms for interocular acuity differences.

© 1986 Optical Society of America