Internal Anatomy of Eye- Structures

Question 1

Cornea

Answer 1

Transparent; anterior portion of the sclera; allows light to reach retina and some light refractions. Preservative turns it opaque

Question 2

Pupil

Answer 2

Hole in center of iris

Question 3

Iris

Answer 3

Round sheets of smooth muscle, contraction regulates size of pupil; colored portion of eye

Question 4

Ciliary body and muscle

Answer 4

Anterior, thickened portion of choroid; seen as series of radiating folds posterior to iris. Suspensory ligaments attached here

Question 5

Suspensory Ligaments

Answer 5

Suspends the lens in place, connected to ciliary body

Question 6

Lens

Answer 6

Spherical, clear structure; makes the lens opaque. Main light refracting structure

Question 7

Retina

Answer 7

Innermost layer of eye, only in the posterior cavity. Thin, cream colored; contains photo receptors

Question 8

Optic disc

Answer 8

Also called blind spot. Single attachment to optic nerve

Question 9

Choroid

Answer 9

Middle later of eye; posterior portion. Pigmented and highly vascularized.
Seen internally by peeling retina

Question 10

Tapetum Lucidum

Answer 10

Found in mammals, but not humans. Silver- blue pigmented portion of choroid; reflects light in posterior cavity for increased efficiency of light absorption under low-light condition

Question 11

Sclera

Answer 11

White, thick, outer protective covering