EYE

Question 1

loss of clarity of the lens, mainly affects dogs

Answer 1

cataract

Question 2

It is the medial deviation of the eyeball. Common in Siamese cat

Answer 2

Medial strabismus

Question 3

small undeveloped eye, due to Vit. A deficiency in the mother. Common in pig, dog and cattle.

Answer 3

Microphthalmia

Question 4

a defect due to failure of the optic fissure to close

Answer 4

coloboma

Question 5

absence of eye due to failure of optic vesicles to form or to severe inference
w/ normal growth of optic cup

Answer 5

anophthalmia

Question 6

development of a single eye in the center of the head due to failure of the optic field to separate into 2 lateral eye-forming regions

Answer 6

cyclopia

Question 7

Develops by invagination and budding of conjunctival ectoderm

Answer 7

lacrimal gland

Question 8

Derived from the space between the eyelid and the cornea

Answer 8

conjunctival sac

Question 9

formed by upper and lower folds of ectoderm (skin), each fold includes a mesenchyme
core

Answer 9

eyelids

Question 10

three tunics/layers of the wall of the eyes

Answer 10

fibrous
vascular
nervous

Question 11

contains the choroid, ciliary body and ciliary processes and iris

Answer 11

vascular tunic

Question 12

contains the cornea and sclera

Answer 12

fibrous tunic

Question 13

contains the retina

Answer 13

nervous tunic

Question 14

the eyeball has anterior compartment which is composed of anterior and posterior chambers, and both of these chambers contain clear fluid called

Answer 14

aqueous humor

Question 15

posterior compartment of the eyeball consists of the vitreous chamber that contains?

Answer 15

vitreous humor

Question 16

Both eyes develop from the ______, a single median region of the neural plate ectoderm near the rostral margin of the head.

Answer 16

optic field

Question 17

The outer wall of the optic cup thins out to become the?

Answer 17

pigment layer of the
retina

Question 18

While the inner wall of the optic cup collapses and thickens to become the?

Answer 18

sensory (rods and cones) layer of the retina

Question 19

the opening through which blood vessels and optic nerve fibers exit/enter from/to the choroid/retina of the eye

Answer 19

choroid fissure

Question 20

vitreous or posterior compartment develops from the?

Answer 20

concavity of the optic cup

Question 21

vitreous body is formed from?

Answer 21

ectomesenchyme

Question 22

The surface ectoderm overlying the optic vesicles, by induction from the optic vesicles and placode formation, thickens to form the?

Answer 22

lens placode