Ocular Anatomy and Conditions 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 Conditions flashcards as text
Which layer of the cornea is responsible for rapid regeneration after injury?
Answer: Epithelium
The corneal epithelium can regenerate completely within 24–48 hours due to its high cell turnover rate.
The fovea centralis is located within which structure of the eye?
Answer: Macula lutea
The fovea centralis is the central pit of the macula lutea and provides the sharpest central vision.
Aqueous humor is produced by which ocular structure?
Answer: Ciliary body
The ciliary body's non-pigmented epithelium actively secretes aqueous humor into the posterior chamber.
Which condition is characterized by elevated intraocular pressure damaging the optic nerve?
Answer: Glaucoma
Glaucoma is a group of conditions where optic nerve damage, often from elevated IOP, causes progressive vision loss.
The vitreous humor occupies which portion of the eye?
Answer: Vitreous chamber
The vitreous humor fills the vitreous chamber, the large space between the lens and the retina.
Which muscle is responsible for constricting the pupil in bright light?
Answer: Sphincter pupillae
The sphincter pupillae is a circular smooth muscle innervated by the parasympathetic nervous system that constricts the pupil.
A patient with presbyopia has difficulty with near vision primarily because of changes in which structure?
Answer: Crystalline lens
Presbyopia occurs when the crystalline lens loses elasticity with age, reducing the eye's ability to accommodate for near vision.