Ocular Anatomy Flashcards
7 cards from real CPOA practice questions. Tap to flip, then mark Knew It or Still Learning — missed cards come back until you master them.
Read the first 7 Ocular Anatomy flashcards as text
Which layer of the cornea is responsible for its transparency and makes up approximately 90% of its thickness?
Answer: Stroma
The stroma consists of regularly arranged collagen lamellae that give the cornea its optical clarity and comprises about 90% of corneal thickness.
What is the name of the junction between the cornea and the sclera?
Answer: Limbus
The limbus is the transitional zone where the transparent cornea meets the opaque white sclera.
The fovea centralis is located within which structure?
Answer: Macula lutea
The fovea centralis is a small depression at the center of the macula lutea that provides the sharpest visual acuity.
Which muscle is responsible for depressing and abducting the eye?
Answer: Superior oblique
The superior oblique muscle primarily intorts and depresses the eye, with a secondary action of abduction.
What type of cells are predominantly found in the fovea?
Answer: Cone photoreceptors
The fovea contains only cone photoreceptors, which are responsible for high-acuity color vision in bright light.
The aqueous humor is produced by which structure?
Answer: Ciliary body
The ciliary body's non-pigmented epithelium actively secretes aqueous humor into the posterior chamber.
Which cranial nerve innervates the lateral rectus muscle?
Answer: CN VI
The abducens nerve (CN VI) innervates the lateral rectus, which abducts the eye.