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Flashcards in eye anatomy Deck (26):
1

- lateral end of eye
- produces lacrimal fluid

lacrimal gland

2

- drain lacrimal fluid
from eyes

Lacrimal canals

3

provides passage of lacrimal fluid towards nasal cavity

lacrimal sac

4

Muscles attached to the outer surface of the eye
Produce eye movements

extrinsic eye muscles

5

moves eye laterally

lateral rectus

6

moves eye medially

medial rectus

7

elevates eye and rolls it medially

superior rectus

8

, depresses eye and rotates it laterally

inferior rectus

9

produce gross movement and allow the eye to follow a moving object

rectus muscles

10

The wall is composed of three tunics

fibrous
vascular
nervous/sensory

11

outermost tunic
Thick white connective tissue layer
Seen anteriorly as the “white of the eye”

sclera

12

Transparent, central anterior portion
Allows for light to pass through
Most exposed part

cornea

13

part of the fibrous tunic
Repairs itself easily
the only human tissue that can be transplanted without fear of rejection
When touched it will cause blinking and tearing of eyes

cornea

14

Blood-rich nutritive tunic
Pigment prevents light from scattering
Modified anteriorly into two structures (ciliary body and iris)

vascular

15

Pigmented layer that gives eye color
With circularly and radially arranged smooth muscles

iris

16

– rounded opening in the iris

pupil

17

Innermost tunic
Extends anteriorly to the ciliary body
Contains photoreceptor cells

sensory tunic retina

18

Most are found towards the edges of the retina
Allow dim light vision and peripheral vision
Perception is all in gray tones

rods

19

Allow for detailed color vision
Fovea centralis

cones

20

area of the retina with only cones
- Area with great or sharpest vision

fovea centralis

21

No photoreceptor cells are at the

optic disk, or blind spot

22

Biconvex crystal-like structure
Held in place by a suspensory ligament attached to the ciliary body

lens

23

Watery fluid found in chamber between the lens and cornea
Similar to blood plasma

aqueous humor

24

Internal Eye Chamber Fluid
Helps maintain intraocular pressure
Provides nutrients for the lens and cornea

aqueous humor

25

aqueous humor is Reabsorbed into venous blood through the

canal of Schlemm

26

Gel-like substance behind the lens
Keeps the eye from collapsing
Lasts a lifetime and is not replaced

vitreous humor

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