Physiology of Vision

From Deep to Superficial, the structure of the retina is as follows: [blank_start]Photoreceptors[blank_end] [blank_start]Bipolar cells[blank_end] [blank_start]Ganglion cells[blank_end]

Rhodopsin is found in the [blank_start]rods[blank_end] of the eyes

Rhodopsin contains [blank_start]11-cis-retinal[blank_end]. When light hits this substance it becomes [blank_start]all-trans-retinal[blank_end], which is then broken up into 11-cis-retinal + [blank_start]Vitamin A[blank_end]

One of the main functions of [blank_start]rods[blank_end] is to see in dim light

Label the layers of the retina shown below.

Both horizontal cells and amacrine cells facilitate [blank_start]lateral[blank_end] inhibition which helps in the localisation of a stimulus.

From the optic chiasm, the optic tracts synapse at the [blank_start]lateral geniculate[blank_end] nuclei in the thalamus. From there they project as optic radiations to the primary visual cortex in the [blank_start]occipital[blank_end] lobe of the brain.

Which condition would arise from each of the lesions shown in the diagram? A: [blank_start]Monocular Blindness[blank_end] B: [blank_start]Bitemporal Hemianopia[blank_end] C: [blank_start]Homonymous Hemianopia:[blank_end] D: [blank_start]Quadrantic Hemianopia[blank_end] E: [blank_start]Foveal Sparing Homonymous Hemianopia[blank_end]

The [blank_start]striate[blank_end] cortex is the first part of the primary visual cortex that receives input from the lateral geniculate nucleus in the thalamus.