Читать книгу Essentials of Veterinary Ophthalmology - Kirk N. Gelatt - Страница 145

Retinal disparity is resolved in the visual cortex that has the unenviable task of reconstructing a three‐dimensional image from the projection of this image on two two‐dimensional retinas. The segregation between the outputs of the two eyes is still maintained at the first cortical synapse, that is, the simple cells populating layer 4 of the striate cortex. Binocular interaction begins when these cells output to adjacent layers of the striate cortex and to extrastriate visual areas, where many of the neurons receive binocular input and act as disparity detectors. The disparity‐sensitive neurons of the occipital cortex act as “low‐level” detectors of spatial disparity and process stereopsis; additional neurons in the parietal lobe, inferotemporal cortex, and other cortical areas process “high‐level” cues such as texture, shading, and motion to construct a three‐dimensional image of the visual field.