Van Hoff-van, Duin J. Response properties of striate cortex neurons in cats raised with divergent or convergent strabismus. Direction preference of optokinetic responses in monocularly tested normal kittens and light-deprived cats. This mild convergent strabismus may also be accompanied by a slight bobbling of the eyes (called wandering nystagmus) when the eyes are at rest. In Siamese, Himalayan and flame point Persian cats, the eyes may be somewhat cross-eyed. Kittens were raised with amblyopia by monocular lid suture or esotropia by transection of extraocular muscles in one eye at the age of 2–3 weeks. Data are reported here for 14 cats: 6 animals reared with esotropia combined with sagittal section of the optic chiasm (ESO-OX), 8 control animals. Masking with band-reject filtered noise indicated that detection channels for either eye of the esotropic cats were twice as broadly tuned as those for the control cat. Data from 5 of the control cats have been reported previously . 1978; 116:471-477. In cats the unilateral convergent strabismus surgically induced in the early postnatal life causes monocular spatial vision deficits and loss of binocular activation of the primary visual cortex. 6. Kalil RE, Spear PD, Langsetmo A. It is assumed that the asynchrony of inputs from the two eyes, by disrupting binocular convergence, lead … Interocular interactions in esotropia Arch Ital Biol. 1997 Mar;135(2):145-56. 29. bilateral esotropia, and esotropia combined with lid suture of the unoperated eye. Isometric contractions in the inferior oblique muscle were recorded at 20 weeks or at adult age, and the results were compared with those of similarly aged cats with normal visual development. Misalignment of the two eyes in these cats was found in the awake as well as in the paralysed state. Arch Ital Biol. 2. In ad- dition, a group of esotropes was studied in which the unoperated eye was removed a few hours prior to recording. 28. For comparison, five normal adult cats were also studied. Pupillography combined with measurements of visual disparity yielded abnormal esotropia of up to 8.4 degrees under paralysis, which corresponds to an abnormal convergence of the freely moving eyes of up to 14 degrees (average 7.4 degrees). In conclusion, slow eye movements in cats with congenital esotropia are characterized by extremely low gain, especially at higher stimulus velocities. Recordings were made from striate cortex in five groups of cats that had been raised with strabismus produced by sectioning the extraocular muscles.

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