Chapter 11 word parts and structures

tigrebright's version from 2015-10-31 23:51

Section 1

Question Answer
irid/o; ir/i; itit/oiris, colored part of eye
kerat/ohorny, hard, cornea
myring/o; tympan/otympanic membrane, eardrum
ophthalm/o; opt/o; opt/i; optic/o; oculeye, vision
-opiavision condition
ot/o; acous/o; acoust/o; audi/o; audit/oear, hearing
phak/o' phac/olens of eye
presby/oold age
retin/oretina, net
scler/osclera, white of eye, hard
trop/oturn, change
tympan/otympanic membrane, eardrum
dacryocyst/o; lacrim/oproduce, store and remove tears
pinn/iouter ear
labyrinth/oinner ear
emmetrin proper measure

Section 2

Question Answer
adnexa oculi/ adnexa of the eyesstructures outside the eyeball
adnexathe accessory or adjoining anatomical parts of an organ
orbiteye socket
obliquean angle that is slanted but not perpendicular or parrallel
binocular visionwhen the muscles of the both eyes work in coordination to make normal depth perception possible
depth perceptionthe ability to things in 3 dimensions
canthusthe angle where the upper and lower eyelids meet
ciliasmall hairs
tarsus; tarsal platethe framework within the upper and lower eyelids that provide the necessary stiffness and shape
conjunctivathe transparent mucous membrane that lines the underside of each eyelid

Section 3

Question Answer
lacrimal apparatustear apparatus
lacrimationsecretion of tears
lacrimal glandssecrete lacrimal fluid
lacrimal; tearsmaintains moisture on the anterior surface of the eyeball
lacrimal canalthe tear duct at the inner corner of each eye
lacrimal sac; tear sacenlargement of the upper portion of the lacrimal duct
lacrimal duct; nasolacrimal ductthe passageway that drains excess tears into the nose
eyeball; globea 1" sphere with only about 1/6 of its surface visible
opticpertaining to the eye or sight
ocularpertaining to the eye
extraocularoutside the eyeball
intraocularwithin the eyeball

Section 4

Question Answer
sclera; white of the eyeballmaintains the shape of the eye and protects the delicate inner layers
choroidthe opaque middle layer of the eye that provides the blood supply for the entire eyeball
retinasensitive innermost layer; receives nerve impulses and transmits them to the brain
anterior segment of the eyefront of the eye; divided into anterior and posterior chambers
anterior chamberlocated behind the cornea and in front of the iris
posterior chamberbehind the iris and in front of the ligaments holding the lens in place
aqueous humor/fluidfills the anterior and posterior chambers;helps the eye maintain its shape & nourishes the intraocular structoers
aqueouswatery or containing water
humorany clear body of liquid or semi-fluid substance
intracular pressuremeasurement of the fluid pressure inside the eye

Section 5

Question Answer
posterior segmentlined with the retina and filled with vitreous humor
vitreous humor/gela soft, clear, jelly-like mass that contains millions of fine fibers which help the eye maintain its shape
rods and cones of the retinareceive images and convert them into nerve impulses and transmit them to the brain via the optic nerve
rodsblack and white receptors
conescolor receptors
macula; macula luteathe light-sensitive area in the center of the retina responsible for sharp central vision
maculasmall spot
fovea centralispit in the middle of the macula with a high concentration of cones and no rods
optic disk/blind spotsmall region of the eye where nerve endings of the retina enter the optic nerve; it does not contain any rods or cones
optic nervetransmits nerve impulses from the retina to the brain
uveathe pigmented layer of the eye; contains rich blood supply, choroid, iris and ciliary body

Section 6

Question Answer
ciliary bodya set of muscles and ligaments that adjust the thickness of the lens to refine the focus of light rays on the retina
focus on nearby objectslens becomes thicker
focus on distant objectslens becomes thinner
iriscontrols the amount of light that is allowed to enter through the pupil
dilatewhen the muscles of the iris relax to let in more light
corneathe transparent outer surface; the primary structure focusing light rays entering the eye
pupilpermits light to enter the eye
lensstructure that focuses images on the retina
accommodationprocess whereby the eyes make adjustments for seeing objects at various distances
convergencethe simultaneous inward movement of the eyes toward each other
emmetropianormal relationship between the refractive power of the eye and the shape of the eye; enables light rays to focus correctly on the retina
refractionthe ability of the lens to bend light rays so they focus on the retina
visual acuitythe ability to distinguish object details and shape at a distance
acuity sharpness

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