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
The uvea consists of which three structures?
Answer: Iris, ciliary body, and choroid
The uveal tract is the vascular middle layer of the eye comprising the iris anteriorly, the ciliary body, and the choroid posteriorly.
A patient presents with a sudden shower of floaters and flashes of light. The optician should immediately refer for evaluation of which condition?
Answer: Retinal detachment
Sudden floaters and photopsia (flashes) are classic warning signs of posterior vitreous detachment or retinal tear/detachment requiring urgent evaluation.
The choroid's primary function is to:
Answer: Supply oxygen and nutrients to the outer retina
The highly vascular choroid supplies oxygen and nutrients to the outer retinal layers, including the photoreceptors.
Which refractive error results from the eyeball being too long axially?
Answer: Myopia
Myopia (nearsightedness) occurs when the axial length of the eye is too long relative to its optical power, focusing parallel light in front of the retina.
The conjunctiva covers which two areas of the eye?
Answer: Eyelid inner surface and anterior sclera (bulbar area)
The conjunctiva lines the inner eyelids (palpebral) and reflects onto the anterior sclera (bulbar) up to the limbus.
Keratoconus is a progressive condition affecting which structure?
Answer: Cornea
Keratoconus causes the cornea to progressively thin and bulge outward into a cone shape, causing irregular astigmatism.
The Zinn's zonules (zonular fibers) connect the crystalline lens to which structure?
Answer: Ciliary body
Zonular fibers suspend the crystalline lens from the ciliary body; ciliary muscle contraction relaxes tension on the zonules, allowing the lens to thicken for near focus.