Vocab #5 Flashcards Preview

Medical Issues in Athletic Training > Vocab #5 > Flashcards

Flashcards in Vocab #5 Deck (20):
1

globe

eyeball
organ used for sight

2

bony orbit

eye socket
comprises four walls made up of seven different facial bones, connective tissue, fat, blood vessels, and nerves
-palantine, zygomatic, maxillary, sphenoid, ethmoid, lacrimal)

3

bony orbit functions

houses the eye and its appendages
provides protection for the eyeball
contains the lacrimal gland which produces the tears that lubricate and rinse the surface of the eye
provides anchorage for the six small extraocular muscles that move the eye

4

optic nerve

cranial nerve II
carry sensory information relating to vision from the retina of the eye to the brain

5

conjunctiva

thin, essentially transparent, highly vascular mucous membrane that covers the anterior sclera and the posterior surface of both the upper and lower eyelids
distributes tears evenly across the eye

6

lacrimal gland

gland in the eye that produces and secretes tears to lubricate the surface of the eye

7

sclera

dense white connective tissue that makes up more than 90% of the outer layer of the eyeball and provides structure for the contents of the eyeball

8

cornea

transparent membrane of the outer layer of the eyeball that covers the iris and pupil
functions
-barrier between the environment and the aqueous humor
-clear window of the eye through which light passes

9

iris

round pigmented contractile membrane of the eye
functions
-created the color of the eye
-contraction and expansion of the iris controls the size of the pupil, thereby regulating the amount of light reaching the retina

10

lens

round, transparent tissue located directly behind the iris
focuses light rays entering through the pupil to form an image on the retina

11

retina

thin, transparent membrane lining the back of the eye that receives light and sends the initial visual signal through the optic nerve to the brain

12

choroid
-another name

choriocapillaris
vascular layer of the eye between the sclera and the retina
provides blood, oxygen and nourishment to the outer layers of the retina

13

optic disk

visible portion of the optic nerve that can be seen when examining the eye
where the ganglion cell axons exit the eye to form the optic nerve
no light sensitive rods or cones to respond to a light stimulus
-causes the blind spot

14

macula

minute yellowish area located near the center of the retina of the eye at which visual perception is most acute
houses the fovea

15

pupil

round, central opening in the iris that creates a pathway for light to reach the retina
dilates or constricts to regulate the amount of light that enters the eye

16

aqueous humor

clear fluid that fills the space between the cornea and the iris (anterior chamber)
provides oxygen to eye tissues that lack a direct blood supply and removes waste products

17

vitreous humor

transparent gelatinous fluid that fills the space behind the lens
keeps the eyeball "inflated" in a spherical shape

18

ciliary body

houses the zonules
-suspend the lens and control its thickness by contracting or relaxing it, allowing the image to be focused onto the retina)
connects the choroid with the iris

19

fovea

center point of the macula
site of central vision and color perception of the eye
site of sharpest vision where cones are concentrated the most

20

cones

color receptors
cone colors are red, green, and blue
found in the macula