Layers of the Eye + Anatomy

Question 1

Outer Fibrous Layer

Answer 1

Contains the Sclera and Cornea (continuous with each other for structure and protection)

Question 2

Vascular Layer

Answer 2

Choroid (contains blood vessels), iris, and ciliary body

Question 3

Inner Neural Layer

Answer 3

Has Retina, which is comprised of pigmented layer innermost and neural layer outermost

Question 4

Anterior Cavity

Answer 4

Front of the eye extending from cornea to the lens

Filled with aqueous humor

Two chambers

Question 5

The two chambers of the anterior cavity

Answer 5

Anterior Chamber:
Location is space between the cornea and iris. Filled with aqueous humor

Posterior Chamber: Location is narrow space between the iris and lens, including the area around the ciliary body. Filled with aqueous humor

Question 6

Posterior Cavity

Answer 6

Located within large space behind the lens, extending to the retina

Filled with vitreous humor

Question 7

Ciliary Body

Answer 7

Connects the to the lens and controls its shape

Question 8

Optic disc (blind spot)

Answer 8

Is the exit that leads to your optic nerve (collection of axons)

Question 9

Pupil

Answer 9

The hole the lens sits in

Question 10

Fovea

Answer 10

Area with highest amount of cones (photoreceptors)

Question 11

What structure is unique to a sheep’s eye?

Answer 11

Tapetum Lucidum. Sits behind the retina to enhance night vision.

OR, it’s their rectangular pupils that allow for wider field of view compared to humans.

Question 12

Tracing a Photon through the eye

Answer 12

Enter through CORNEA. Pass the IRIS and through PUPIL hole that’s created by PUPILLARY MUSCLES. Then pass through LENS to focus light onto RETINA. Photoreceptors (rods and cones) see the light. CHOROID prevents stray photons from activating more receptors. The photoreceptic info turns into a neural signal traveling via OPTIC NERVE where half of vision crosses at OPTIC CHIASM to travel to visual cortex (lateral and contralateral depending on left/right vision)