Читать книгу Essentials of Veterinary Ophthalmology - Kirk N. Gelatt - Страница 140

Moving through the environment produces a flow of images projected onto the photoreceptors, resulting in huge amounts of visual information necessary for navigating through a complex environment. Perception of motion is required for both directing visual attention to a certain location in the visual field and segmenting moving objects from their background. Psychophysically, there are various ways of discerning motion: (i) movement can be perceived if an object is moving across our visual field while our eyes and head are stationary; and (ii) motion can also be perceived when either the head or the eyes are moved to pursue a moving object.