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med term ch 13
ch 13
19
Medical
Undergraduate 2
04/27/2011

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Cards

Term
sclera
Definition
outer layer of the eye; white of the eye
Term
cornea
Definition
bend or refracts light
Term
choroid
Definition
opaque layer that provides the blood supple for the eye
Term
iris
Definition
colored portion of the eye and contains smooth muscle
Term
pupil
Definition
the opening in the center of the iris that allows light rays to enter the eyeball
Term
rods
Definition
active in dim light and help us to see in gray tones
Term
cones
Definition
are active in bright light and are responsible for color vision
Term
macula lutea
Definition
where the lens projects an image on the retina, a yellow spot
Term
fovea centralis
Definition
central pit that contains a high concentration of sensory receptor cells and is the point of clearest vision
Term
optic disk
Definition
where retinal blood vessels enter and exit the eyeball and where the optic nerve leaves the eyeball
Term
aqueous humor
Definition
watery fluid that fills the spaces between the cornea and lens
Term
vitreous humor
Definition
semesolid gel that fills the large area between the lens and the retina
Term
emmetropia
Definition
state of normal vision
Term
legally blind
Definition
describes a person who has severely impaired vision
Term
nyctalopia
Definition
difficulty seeing in dim light
Term
ophthalmology
Definition
branch of medicine involving the diagnosis and treatment of conditions and diseases of the eye and surrounding structures
Term
optician
Definition
specialist in grinding corrective lenses
Term
papilledema
Definition
swelling of the optic disk.
Term
photophobia
Definition
although the term translates into fear of light
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