Eye anatomy

Question 1

Spherical and avascular white dense connective tissue that covers the glove posterior to cornea

Answer 1

Sclera

Question 2

Sclera function:

Answer 2

• It’s toughness protects the delicate optic/neural structures such as the retina
• maintains shape of the globe so that retinal image is undisturbed
• provides attachment for extraocular muscles to rotate the globe and the ciliary muscle to accommodate the lens

Question 3

“Window of the eye”

Answer 3

Cornea

Question 4

Cornea function:

Answer 4

-strong connective tissue that covers anterior 1/6 surface of eye
Focusing element of the eye (more powerful than lens). Light enters the cornea and enters the aqueous humor before reaching retina

Question 5

Lens

Answer 5

a specialized epithelial tissue that fine tunes image projected on retina. It is transparent and has a high refractive power that focuses on nearer objects

Question 6

‘The choroid capillary bed nourishes what structures in the eye?

Answer 6

photoreceptors and outer retina

Question 7

Order from outermost layer to innermost layer: choroid, retina , sclera

Answer 7

sclera, choroid, retina

Question 8

controls the refractive power of lens

Answer 8

ciliary muscle of ciliary body

Question 9

produces the aqueous humor filling the anterior chamber

Answer 9

vascular component of the ciliary body

Question 10

nourishes the cornea and lens

Answer 10

aqueous humor

Question 11

thick gelatinous substance filling the space between the back of the lens and the surface of the retina

Answer 11

vitreous humor

Question 12

contains neurons that absorb light and process visual information in the images and sends that information to the brain

Answer 12

retina

Question 13

oval spot containing a yellowish pigment (xantrophy) and supports high acuity

Answer 13

Macula

Question 14

small depression at the cent er of the macula

Answer 14

fovea

Question 15

has highest spatial acuity

Answer 15

fovea

Question 16

site where blood vessels supplying the inner retina enter the eye

Answer 16

optic disk

Question 17

wihitish circuclar area where retinal axons leave the eye and travel through the optic nerve to targets in the midbrain and thalamus

Answer 17

optic disk

Question 18

Two vascular systems that supply the eye

Answer 18

1. Anterior _ (iris and ciliary body)- anterior ciliary areteris and long posterior ciliary arteries = origin, penetrates sclera
2. Retinal Systems- inner retinal and choroidal (supplying outer retina from the ophthalmic artery)

Question 19

choroid ciliary body and iris make up the

Answer 19

uveal tract

Question 20

80% of light bending refractive power lies in this part of eye and is used for focusing distant images

Answer 20

Cornea

Question 21

Opthalmoscope view:

Answer 21

surface of retina and vasculature of inner retina

Question 22

200 micron thin neural tissue that lines back of eye

Answer 22

retina

Question 23

window to the brain tha tis part of CNS

Answer 23

RETINA