Snail-shaped, spirally wound tube in the inner ear contains hearing-sensitive receptor cellsįluid within the labyrinth of the inner ear Waxy substance secreted by the external ear also called ear wax Two layers of the retina separate from each otherĬhannel that leads from the pinna to the eardrumĬarry impulses from the inner ear to the brain (cerebral cortex), these fibers compose the vestibulocochlear nerve (cranial nerve VIII)Ĭhannel between the middle ear and the nasopharynx eustachain tubeįlap of the ear the protruding part of the external ear, or pinna Repetitive rhythmic movements of one or both eyes Progessive damage to the macula of the retina Localized, purulent, inflammatory staphylococcal infection of a sebaceous gland in the eyelid Increased intraocular pressure results in damage to the retina and optic nerve with loss of vision Retinal effects of diabetes mellitus include microaneurysms, hemorrhages, dilation of retinal veins, and neovascularization Small, hard, cystic mass (granuloma) on the eyelid formed as a result of chronic inflammation of a sebaceous gland along the margin of the eyelid Impairment of vision as a result of old ageĬlouding of the lens, causing decreased vision Soft, jelly-like material behind the lens in the vitreous chamber helps maintain the shape of the eyeballĭefective curvature of the cornea or lens of the eye optic nerve fibers pass through here on their way to the cerebral cortex Photoreceptor cell of the retina essential for vision in dim light and for peripheral vision Light-sensitive nerve cell layer of the eye containing photoreceptor cells (rods & cones) it is the blind spot of the eye because it contains only nerve fibers, no rods or cones, and is thus insensitive to lightĬranial nerve carrying impulses from the retina to the brain (cerebral cortex)ĭark opening of the eye, surrounded by the iris, through which light rays passīending of light rays by the cornea, lens, and fluids of the eye to bring the rays into focus on the retina Region at the back of the eye where the optic nerve meets the retina. Point at which optic nerve fibers cross in the brain Yellowish region on the retina lateral to and slightly below the optic disc contains fovea centralis, which is the area of clearest vision it bends (refracts) light rays to bring them into focus on the retina Transparent, biconvex body behind the pupil of the eye. Tiny pit or depression in the retina that is the region of clearest visionĬolored pigmented membrane surrounding the pupil of the eye responsible for color and central visionĭelicate membrane lining the eyelids and covering the anterior eyeballįibrous trnsparent layer of clear tissue that extends over the anterior portion of the eyeball Photoreceptor cell in the retina that transforms light energy into a nerve impulse. It contains ciliary muscles, which control the shape of the lens, and it secretes aqueous humor. Structure on each side of the lens that connects the choroid and iris. Middle, vascular layer of the eye, between the retina and the sclera Having two sides that are rounded, elevated, and curved evenly, like part of a sphere it contains aqueous humor.įluid produced by the ciliary body and found in the anterior chamber Normal adjustment of the eye to focus on objects from far to nearĪrea behind hte cornea and in front of the lens and iris. The Eye and Ear Chabner, Language of Medicine 8th Edition, Chpt 17 Vocabulary Question
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