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
What is the primary function of the retinal pigment epithelium (RPE)?
Answer: Absorbing scattered light and supporting photoreceptors
The RPE absorbs excess light, recycles visual pigments, and provides metabolic support to the overlying photoreceptors.
Which structure separates the anterior chamber from the posterior chamber of the eye?
Answer: Iris
The iris acts as a diaphragm dividing the anterior and posterior chambers, with the pupil as the opening between them.
The zonules of Zinn connect the lens to which structure?
Answer: Ciliary body
The zonular fibers (suspensory ligaments) extend from the ciliary body to the lens equator, holding the lens in position and transmitting ciliary muscle forces.
Which layer of the retina contains the cell bodies of rod and cone photoreceptors?
Answer: Outer nuclear layer
The outer nuclear layer contains the nuclei (cell bodies) of the rod and cone photoreceptors.
What is the approximate horizontal diameter of a normal adult cornea?
Answer: 11–12 mm
The average adult cornea measures approximately 11–12 mm horizontally and 10–11 mm vertically.
The choroid is primarily composed of which type of tissue?
Answer: Vascular tissue with melanocytes
The choroid is a highly vascular layer containing blood vessels and melanocytes that nourish the outer retina and absorb stray light.
Which extraocular muscle elevates and adducts the eye?
Answer: Superior rectus
The superior rectus primarily elevates the eye and has secondary actions of adduction and intorsion.