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water 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
vascular layer beneath the sclera that provides nourishment to the outer portion of the retina
epithelial tissue folds on the inner surface of the ciliary body that secrete aqueous humor
joining together; mucous membrane that lines the eyelids and outer surface of the eyeball
transparent, anterior part of the eyeball covering the iris, pupil, and anterior chamber that functions to refract (bend) light to focus a visual image
pinpoint depression in the center of the macula lutea that is the site of sharpest vision
interior surface of the eyeball including the retina, optic disk, macula, and posterior pole (curvature of the back of the eye)
colored circle; colored part of the eye located behind the cornea that contracts and dilates to regulate light passing through the pupil
central region of the retina responsible for central vision; yellow pigment provides its color
exit site of retinal nerve fibers, as well as the entrance point for retinal arteries and the exit point for retinal veins
nerve responsible for carrying impulses for the sense of sight from the retina to the brain
space between the back of the iris and the front of the vitreous filled with aqueous fluid
black circular opening in the center of the iris through which light passes as it enters the eye
jelly-like mass filling the inner chamber between the lens and retina that gives bulk to the eye
involuntary contraction of the muscles surrounding the eye, causing uncontrolled blinking and lid squeezing
defects in the bending of light as it enters the eye, causing an improper focus on the retina
distorted vision caused by an oblong or cylindrical curvature of the lens or cornea that prevents light rays from coming to a single focus on the retina
farsightedness; difficulty seeing close objects when light rays extend beyond the proper focus on the retina
nearsightedness; difficulty seeing distant objects when light rays fall short of the proper focus on the retina
lazy eye- decreased vision in early life due to a functional defect that can occur as a result of strabismus, refractive errors or trauma; usually occurs in one eye
chronic nodular inflammation of a meibomian gland, usually the result of a blocked duct; commonly presents as swelling on the upper or lower eyelid
disease of the retina in diabetics characterized by capillary leakage, bleeding, and new vessel formation, leading to scarring and loss of vision
group of diseases of the eye characterized by increased intraocular pressure that results in damage to the optic nerve, producing defects in vision
breakdown or thinning of the tissues in the macula, resulting in partial or complete loss of central vision
separation of the retina from the underlying epithelium, disrupting vision and resulting in blindness if not repaired surgically
distance visual acuity
measure of the ability to see the details and shape of identifiable objects from a specified distance, typically using a Snellen chart
visualization & photography of retinal and choroidal vessels made as fluorescein dye, which is injected into a vein, circulates through the eye
measurement of refractive errors using a phoropter to determine best corrective vision and prescription for eye glasses or contact lenses
instrument that holds corrective lenses in front of the eye to determine optical correction
use of high-frequency sound waves to detect pathology within the eye such as foreign bodies or a detached retina
incision into the iris (usually with a laser) to allow for drainage of aqueous humor from the posterior to anterior chamber; used to treat a type of glaucoma
(LASIK)laser-assisted in situ keratomileusis
technique using the excimer laser to reshape the surface of the cornea to correct refractive errors such as myopia, hyperopia, and astigmatism
(IOL) intraocular lens implant
implantation of an artificial lens to replace a defective natural lens
smooth muscle portion of the ciliary body, which contracts to assist in near-vision capability
external auditory meatus (canal)
external passage for sounds collected from the pinna to the tympanum
3 canals within the inner ear that contain specialized receptor cells that generate nerve impulses with body movement
sensorineural hearing loss
hearing impairment caused by lesions or dysfunction of the auditory nerve
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