ABO Exam Prep – Anatomy Questions & Answers
Fibrous Tunic
Vascular Tunic
Nervous Tunic - ANSWER-What three layers are the eye made up of?
Fibrous Tunic - ANSWER-Consists of the sclera and the cornea.
Vascular Tunic - ANSWER-Consists of the iris, the choroid, and the ciliary body and is...
Nervous Tunic - ANSWER-What three layers are the eye made up of?
Fibrous Tunic - ANSWER-Consists of the sclera and the cornea.
Vascular Tunic - ANSWER-Consists of the iris, the choroid, and the ciliary body and is responsible for
nourishment
Nervous Tunic - ANSWER-The inner layer of photoreceptors and neurons which consists of the retina;
Contains rods and cones
Rods - ANSWER-Lets us see at twilight and in dimly lit rooms; does not discriminate between different
colors of light.
About 120 million rods
Cones - ANSWER-Cones require brighter light to function than rods do;
Discriminate colors.
About 6 million in Fovea
Macula - ANSWER-Where light will focus in a
healthy eye
Fovea - ANSWER-The highest concentration of cones is found at the fovea which is the center of the
macula
, Optic Disc (Blind Spot) - ANSWER-The point where the optic nerve enters the eye;
Does not contain receptor cells so it is sometimes called the "blind spot"
What are the three fluid-filled chambers in the eye? - ANSWER-Anterior Chamber
Posterior Chamber
Vitreous Chamber
Anterior Chamber - ANSWER-Located between the cornea and the iris
Posterior Chamber - ANSWER-Located between the iris and the lens
Vitreous Chamber - ANSWER-Located between the retina and the lens;
Is filled with a thicker gel-like substance called Vitreous humor which maintains the shape of the eye
Aqueous Humor - ANSWER-Watery fluid produced by the ciliary body. It maintains pressure (called
intraocular pressure or IOP) and provides nutrients to the lens and cornea.
Canal of Schlemm - ANSWER-Where the Aqueous Humor is continually drained from the eye.
Cornea - ANSWER-A transparent dome shaped layer that sits in front of the eye and lets light enter
through
5 Distinct Cornea Layers
Memory Hint: B comes before D and think "end" for last layer. - ANSWER-Epithelium
Bowman's Membrane
Stroma
Descemet's Membrane
Endothelium
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