Thin transparent covering of the eye through which light enters. It serves as as a fixed lens that focuses light
concentrates light on a group of photoreceptors
Regulates the size of the light opening (pupil)
Allows light to enter the eye
the light-sensitive membrane covering the back wall of the eyeball
area consisting of a small depression in the retina containing cones and where vision is most acute
the limpid fluid within the eyeball between the cornea and the lens
A thick, gelatinous fluid found in the posterior segment of the eye (between the lens and the retina). The vireous humor is only produced during fetal development and helps maintain intraocular pressure (the pressure inside the eyeball).
a fibrous membrane that holds the lens of the eye in place
muscles which relax or contract and alter the shape of the lens
middle layer of tissue in the eye that contains blood vessels that nourish the retina
the nerve that carries neural impulses from the eye to the brain
the point where the optic nerve enters the retina. (blind spot)
whitish fibrous membrane (albuginea) that with the cornea forms the outer covering of the eyeball
a coiled bony fluid-filled tube in the inner ear trough which sound waves trigger nerve impulses
the membrane in the ear that vibrates to sound (eardrum)
the area that sound waves pass through to reach the eardrum
the external structure of the ear
fenestra that has the base of the stapes attached to it
Organ of Corti
the hearing organ of the inner ear
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