An electrical signal recorded from a part of the brain following stimulation of a sensory pathway. A visual evoked potential can be recorded following stimulation of the retina by light, which is usually accomplished by using a stobe light or television screen displaying alternating patterns of black and white squares. Ganglion cell One of many cell types in the retina. The side of the retina with ganglion cell bodies and their axons that abuts the vitreous body. An age-related degenerative disease of the retina that causes loss of the rods and cones, which renders a patient blind.
Vision is lost in the center of the visual field, which makes reading especially difficult.
Peripheral vision is spared. Neuron Nerve cell. The side of the retina populated by rods and cones that abuts the retinal pigment epithelium. Photoreceptors Rods and cones. The photoreceptors convert the energy of light entering the eye into an electrical signal that is transmitted from the outer retina where the rods and cones reside to the inner retina, and from there to the brain via the optic nerve.