ABO NOCE Basic Opticianry Ocular Anatomy and Conditions Questions and Answers 3 — Questions and Answers
Question 1: Which part of the uveal tract provides the eye with its primary blood supply?
- Iris
- Ciliary body
- Choroid (Correct answer)
- Trabecular meshwork
Correct answer: Choroid
The choroid is a highly vascular layer that supplies oxygen and nutrients primarily to the outer retina.
Question 2: Horner's syndrome affecting the eye includes miosis, ptosis, and which other sign?
- Mydriasis
- Anhidrosis of the ipsilateral face (Correct answer)
- Increased IOP
- Exophthalmos
Correct answer: Anhidrosis of the ipsilateral face
Disruption of the sympathetic pathway causes the classic triad: miosis, ptosis, and anhidrosis on the same side.
Question 3: The vitreous humor is attached most firmly to the retina at the:
- Macula
- Optic nerve head and ora serrata (Correct answer)
- Equator
- Fovea
Correct answer: Optic nerve head and ora serrata
The vitreous base, which spans the ora serrata and pars plana, is its firmest attachment point; the optic disc attachment is also strong.
Question 4: Which type of glaucoma is characterized by a sudden, painful rise in intraocular pressure with a shallow anterior chamber?
- Primary open-angle glaucoma
- Normal-tension glaucoma
- Acute angle-closure glaucoma (Correct answer)
- Secondary glaucoma
Correct answer: Acute angle-closure glaucoma
Acute angle-closure glaucoma occurs when the iris blocks aqueous drainage at the iridocorneal angle, causing a rapid IOP spike with pain and red eye.
Question 5: The crystalline lens is held in place by structures called:
- Pectinate ligaments
- Zonules of Zinn (Correct answer)
- Tenon's capsule fibers
- Suspensory ligament of Lockwood
Correct answer: Zonules of Zinn
Zonular fibers (zonules of Zinn) connect the lens capsule to the ciliary body and maintain lens position.
Question 6: Which retinal condition involves 'sea-fan' neovascularization and is associated with sickle cell disease?
- Central retinal vein occlusion
- Proliferative sickle cell retinopathy (Correct answer)
- Coats' disease
- Eales' disease
Correct answer: Proliferative sickle cell retinopathy
Proliferative sickle cell retinopathy produces peripheral sea-fan neovascular fronds due to ischemia from sickling in retinal vessels.
Question 7: Bowman's layer of the cornea is unique because it:
- Contains corneal nerves
- Does not regenerate once damaged (Correct answer)
- Produces aqueous humor
- Acts as the primary refractive surface
Correct answer: Does not regenerate once damaged
Bowman's layer is acellular and cannot regenerate; damage results in permanent scarring.
ABO NOCE Basic Opticianry Ocular Anatomy and Conditions Questions and Answers 3
Which part of the uveal tract provides the eye with its primary blood supply?