EYE Flashcards
loss of clarity of the lens, mainly affects dogs
cataract
It is the medial deviation of the eyeball. Common in Siamese cat
Medial strabismus
small undeveloped eye, due to Vit. A deficiency in the mother. Common in pig, dog and cattle.
Microphthalmia
a defect due to failure of the optic fissure to close
coloboma
absence of eye due to failure of optic vesicles to form or to severe inference
w/ normal growth of optic cup
anophthalmia
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
cyclopia
Develops by invagination and budding of conjunctival ectoderm
lacrimal gland
Derived from the space between the eyelid and the cornea
conjunctival sac
formed by upper and lower folds of ectoderm (skin), each fold includes a mesenchyme
core
eyelids
three tunics/layers of the wall of the eyes
fibrous
vascular
nervous
contains the choroid, ciliary body and ciliary processes and iris
vascular tunic
contains the cornea and sclera
fibrous tunic
contains the retina
nervous tunic
the eyeball has anterior compartment which is composed of anterior and posterior chambers, and both of these chambers contain clear fluid called
aqueous humor
posterior compartment of the eyeball consists of the vitreous chamber that contains?
vitreous humor
Both eyes develop from the ______, a single median region of the neural plate ectoderm near the rostral margin of the head.
optic field
The outer wall of the optic cup thins out to become the?
pigment layer of the
retina
While the inner wall of the optic cup collapses and thickens to become the?
sensory (rods and cones) layer of the retina
the opening through which blood vessels and optic nerve fibers exit/enter from/to the choroid/retina of the eye
choroid fissure
vitreous or posterior compartment develops from the?
concavity of the optic cup
vitreous body is formed from?
ectomesenchyme
The surface ectoderm overlying the optic vesicles, by induction from the optic vesicles and placode formation, thickens to form the?
lens placode