jellylike substance found behind the lens in the posterior cavity of the eye that maintains its shape
A shiny layer that lines the area behind the retina of many animals; helps make the eye visible in the dark and allows the animal to see better at night.
tough, fibrous, white outer coat extending from the cornea to the optic nerve
retinal receptors that detect black, white, and gray; necessary for peripheral and twilight vision, when cones don't respond
the light-sensitive inner surface of the eye, containing the receptor rods and cones plus layers of neurons that begin the processing of visual information
the adjustable opening in the center of the eye through which light enters
the nerve that carries neural impulses from the eye to the brain.
a white fatty substance that forms a medullary sheath around the axis cylinder of some nerve fibers
a transparent optical device used to converge or diverge transmitted light and to form images
muscular diaphragm that controls the size of the pupil
the clear tissue that covers the front of the eye
retinal receptor cells that are concentrated near the center of the retina and that function in daylight or in well-lit conditions. The cones detect fine detail and give rise to color sensations.
the point where the optic nerve enters the retina
watery liquid secreted at the ciliary body that fills the anterior and posterior chambers of the eye and provides nourishment for the cornea, iris, and lens