Stereopsis in normal infants and infants with congenital esotropia.

We used electro-oculographic recordings of eye movement responses to a dynamic random-dot stereogram to assess stereopsis in normal infants and in infants with congenital esotropia. Normal infants showed an onset of stereopsis at about 4 months of age, consistent with previous reports. Four of nine infants with congenital esotropia demonstrated stereopsis when tested within two weeks of surgical alignment. No patient with congenital esotropia showed evidence of stereopsis when tested at a postoperative interval of more than two weeks.