To understand to what extent visual-pattern deprivation during infancy results in strabismus and nystagmus, the authors examined the long-term consequences of this type of deprivation in monkeys during the first 50 days of life. Three cynomolgus and three rhesus monkeys had the eyelids sutured closed within 24 hr of birth. At 25 days of age, the eyelids… (More)
Fig. 7. Visual spatial acuity in five experimental monkeys. Successive measurements for each monkey are connected by a line. Spatial acuity is plotted in cycles per degree (cpd) on the left vertical axis, and by Snellen measurements on the right vertical axis. Spatial acuity in the eye that was sutured first (A) was less than the spatial acuity of the fellow eye that was sutured second (B). The spatial acuity in monkey Rh4 (binocular-eyelid suture) had to be examined with both eyes opened because of the severity of the latent nystagmus that occurred during monocular viewing.