In the material obtained from 45 hemispheres, it has been demonstrated that the grey substance volume in field 17 of the brain hemisphere, that of the lateral geniculate body (LGB) and in the LGB itself varies 2-3 times in some individuals. The variation coefficient of the volume of the cerebral visual centers is 2-3 times more than that of the whole brain. The data obtained could be tentatively interpreted as a possible material substrate of the functional vision specificity and its potential genetic predeterminity in some individuals.