Medical Terminology (Chapter 12 roots and combining forms & anatomical terms)

44 terms by jnp454

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aque/o

water

blephar/o

eyelid

blepharospasm

twitch in the eyelid

conjunctiv/o

conjunctiva (to join together)

corne/o, kerat/o

cornea

cycl/o

ciliary body (circle)

ir/o, irid/o

iris (colored circle)

lacrim/o, dacty/o

tear

ocul/o, opthalm/o, opt/o

eye

phac/o, phak/o

lens (lentil)

phot/o

light

presby/o

old age

retin/o

retina

scler/o

sclera (hard)

vitre/o

glassy

-opia

condition of vision

anterior chamber

fluid filled space between the cornea and iris

aqueous humor

watery 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 (humor=fluid)

canal of Schlemm

duct in the anterior chamber that carries filtered aqueous humor to the veins and bloodstream

ciliary processes

epithelial tissue folds on the inner surface of the ciliary body that secretes aqueous humor

conjunctiva

joining together' mucous membrane that lines the eyelids and outer surface of the eyeball

cornea

transparent, anterior part of the eyeball covering the iris, pupil, and anterior chamber that functions to refract (bend) light to focus a visual image

eyelid (palpebra)

movable protective fold that opens and closes, covering the eye

fovea centralis

pinpoint depression in the center of the macula lutea that is the site of sharpest vision

fundus (base)

interior surface of the eyeball including the retina, optic disk, macula, and posterior pole (curvature at the back of the eye).

glands of Zeis

oil glands surrounding the eyelashes

meibomian glands

oil glands located along the rim of the eyelids

iris

colored circle; colored part of the eye located behind the cornea that contracts and dilates to regulate light passing through the pupil

lacrimal gland

gland located in the upper outer region above the eyeball that secretes tears

lacrimal ducts

tubes that carry tears to the lacrimal sac

lacrimal sac

structure that collects tears before emptying into the nasolacrimal duct

lens

transparent structure behind the pupil that bends and focuses light rays on the retina

lens capsule

capsule that encloses the lens

macula lutea (macula)

central region of the retina responsible for central vision; yellow pigment provides its color

pupil

black circular opening in the center of the iris through which light passes as it enters the eye

anisocoria

different size pupils

diplocoria

two pupils in a single eye

retina

innermost layer that perceives and transmits light to the optic nerve

cones

cone shaped cells within the retina that are color sensitive and respond to bright light

rods

rod-shaped cells within the retina that respond to dim light

scotopia

enhanced vision at night

nyctalopia

bad vision at night, night blindness

sclera

tough, fibrous, white outer coat extending from the cornea to the optic nerve

vitreous

jelly-like mass filling the inner chamber between the lens and retina that gives bulk to the eye

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