Ocular Anatomy and Physiology Questions and Answers Flashcards
7 cards from real ABO NOCE Basic Opticianry 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 and Physiology Questions and Answers flashcards as text
The choroid is primarily responsible for:
Answer: Providing oxygen and nutrients to the outer retina
The highly vascular choroid supplies oxygen and nutrients to the outer one-third of the retina, including the photoreceptors.
Bowman's layer is located between which two corneal layers?
Answer: Epithelium and stroma
Bowman's layer is an acellular condensation of stromal collagen immediately beneath the corneal epithelium.
Which cranial nerve innervates the lateral rectus muscle?
Answer: CN VI (Abducens)
The lateral rectus muscle, which abducts the eye, is exclusively innervated by the abducens nerve (CN VI).
The retinal pigment epithelium (RPE) performs all of the following EXCEPT:
Answer: Production of aqueous humor
Aqueous humor is produced by the ciliary body epithelium, not the RPE; the RPE supports photoreceptors through phagocytosis, pigment recycling, and light absorption.
The blind spot in the visual field corresponds to which ocular structure?
Answer: Optic disc
The optic disc (where the optic nerve exits) has no photoreceptors, creating the physiological blind spot in the visual field.
Which type of collagen is the predominant component of the corneal stroma?
Answer: Type I
The corneal stroma is composed predominantly of highly organized Type I collagen fibrils, whose uniform spacing is essential for corneal transparency.
The schlemm's canal is part of which drainage pathway for aqueous humor?
Answer: Trabecular (conventional) outflow
Schlemm's canal is the final vessel in the trabecular (conventional) outflow route, collecting aqueous from the trabecular meshwork and draining into episcleral veins.