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82 Cards in this Set
- Front
- Back
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accomodation
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normal adjestment of the eye to focus on objects from far to near. Ciliary body adjusts the lens and the pupil constricts or dilates
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anterior chamber
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area behind the cornea and in front of lens and iris, contains aqueous humor
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aqueous humor
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fluid produced by the ciliary body and found in the anterior chamber
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biconvex
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consisting of two surfaces that are rounded
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choroid
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middle vascular layer of the eye between the retina and the sclera
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ciliary body (2 functions and def)
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structure surrounding the lens that connects the choroid and iris, controls shape of lens, secretes aqueous humor
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cone
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photoreceptor cell in the retina responsible for color and central vision
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conjunctiva
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delicate membrane lining the undersurface of eyelids and covering the anterior eyeball
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cornea
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fibrous transparent layer that extends over the anterior portion of the eyeball
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fovea centralis
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tiny depression in retina that is region of clearest vision
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fundus of the eye
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posterior, inner part of the eye
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iris
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pigmented layer that opens and closes to allow more or less light into the eye
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lens
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transparent biconvex body behind the pupil of the eye, refracts light rays to bring them into focus on the retina
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macula
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yellowish region on the retina containing the fovea centralis
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optic chiasm
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point at which optic nerve fibers cross in the brain
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optic disc
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blind spot on retina where it meets the optic nerve
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optic nerve
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cranial nerve carrying impulses from the retina to the brain
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pupil
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central opening of the eye, surrounded by the iris, through which light rays pass
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refraction
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bending of light rays to bring them into focus
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3 things that refract light passing into the eye
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cornea, lens, fluids
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retina
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light sensitive nerve cell layer of the eye containing photoreceptor cells
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rod
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photoreceptor cell of the retina essential for vision in dim light and for peripheral vision
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sclera
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tough white outer layer of eyeball
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thalamus
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relay center of the brain - optic nerve fibers pass through on their way to cerebral cortex
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vitreous humor
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soft jelly-like material behind the lens, helps maintain shape of the eyeball.
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aque/o
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R. aqueous humor
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blephar/o; palpebr/o
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R. eyelid (2)
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conjunctiv/o
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R. conjuctiva
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cor/o
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R. pupil
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corne/o
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R. cornea
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cycl/o
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R. ciliary body or eye muscle
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dacry/o; lacrim/o
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R. tears, tear duct (2)
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ir/o; irid/o
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R. iris (2)
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kerat/o
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R. cornea
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ocul/o; ophthalm/o; opt/o; optic/o
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R. eye (4)
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papill/o
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R. optic disc
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phac/o; phak/o
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R. lens of the eye (2 spellings)
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pupill/o
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R. pupil
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retin/o
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R. retina
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scler/o
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R. sclera
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uve/o
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R. uvea
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uvea
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vascular layer of the eye containing iris, ciliary body and choroid
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vitre/o
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R. glassy
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ambly/o
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R. dull, dim
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dipl/o
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R. double
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glauc/o
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R. gray
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mi/o
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R. smaller, less
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mydr/o
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R. widen, enlarge
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nyct/o
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R. night
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phot/o
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R. light
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presby/o
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R. old age
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scot/o
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R. darkness
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xer/o
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R. dry
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-opia; -opsia
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S. vision (2)
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-tropia
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S. to turn
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blepharoptosis
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drooping eyelid
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conjunctivitis
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pink eye
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anisocoria
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unequal opening of pupils
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cycloplegic
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paralysis of the ciliary body
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dacryoadenitis
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inflammation of the tear ducts
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iritis
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inflammation of colored portion of eye, characterized by pain, sensitivity to light, and lacrimation
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optician
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nonmedical professional who grinds lenses and fits glasses, but cannot prescribe lenses
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papilledema
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swollen optic disc associated with intracranial pressure and hyperemia
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phacoemulsification
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technique of cataract extrqaction using ultrasonic vibrations to fragment the lens and aspirate it from the eye
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aphakia
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lack of lens in an eye
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retinitis pigmentosa
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genetic disorder - pigmented scar forms on the retina, destroys retinal rods. Causes decreased vision and nyctalopia
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hypertensive retinopathy
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lesions such as narrowing of arterioles, microaneurysms, hemorrhages and exudates are found on fundus
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amblyopia
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reduction of visual acuity
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diplopia
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double vision
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glaucoma
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mass or collection of fluid in anterior chamber - eye takes on gray-green color
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miosis
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contraction of pupil
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miotic
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drug that causes pupil to contract
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mydriasis
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enlargement of pupils
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nyctalopia
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night blindness - can be caused by deficiency of vit A
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photophobia
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sensitivity to light
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presbyopia
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decreased vision due to aging process
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scotoma
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area of decreased vision surrounded by an area of normal vision (blind spot)
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xerophthalmia
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dry eyes
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hyperopia; hypermetropia
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farsightedness (2 terms)
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esotropia
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inward turning of an eye
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exotropia
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outward turning of one eye
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strabismus
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defect in eye muscles so that both eyes cannot be focused on the same point at the same time
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