ABO Domain 6: Posterior Segment Welcome to your ABO Domain 6: Posterior Segment 1. ABO: Posterior Segment Which of the following is the primary site for aqueous humor drainage in the eye? A. Schlemm's canal B. Zonular fibers C. Scleral spur D. Choroidal vessels None 2. ABO: Posterior Segment In diabetic retinopathy, what mechanism primarily contributes to the development of neovascularization? A. Mechanical compression of the optic nerve B. Hyperglycemic damage to retinal nerve fibers C. Retinal ischemia leading to the production of vascular endothelial growth factor (VEGF) D. Increased intraocular pressure causing retinal vein occlusion None 3. ABO: Posterior Segment Which layer of the retina contains the photoreceptor cells responsible for vision? A. Ganglion cell layer B. Inner nuclear layer C. Outer plexiform layer D. Outer nuclear layer None 4. ABO: Posterior Segment What is the primary role of the vitreous body in the eye? A. To refract light onto the retina B. To supply nutrients to the lens C. To maintain intraocular pressure and eye shape D. To produce aqueous humor None 5. ABO: Posterior Segment Optic disc drusen are best described as: A. Malignant tumors of the optic nerve B. Deposits of extracellular material in the optic nerve head C. Vascular malformations in the retina D. Inflammatory infiltrates within the vitreous humor None 6. ABO: Posterior Segment A "cherry-red spot" on the retina is most commonly associated with: A. Central retinal artery occlusion B. Hypertensive retinopathy C. Age-related macular degeneration D. Retinitis pigmentosa None 7. ABO: Posterior Segment In the evaluation of glaucoma, which retinal nerve fiber layer (RNFL) characteristic is MOST indicative of disease progression? A. Increased reflectivity on OCT B. Uniform thickness across all quadrants C. Thinning, especially in the inferior and superior quadrants D. Thickening in the nasal quadrant None 8. ABO: Posterior Segment What is the primary mechanism of action for laser photocoagulation therapy in the treatment of proliferative diabetic retinopathy? A. Destruction of neovascularization B. Stimulation of aqueous humor production C. Reduction of vitreous opacity D. Enhancement of retinal photoreceptor response None 9. ABO: Posterior Segment Which condition is characterized by a bilateral, symmetric yellowish deposit beneath the sensory retina in the macular region? A. Diabetic macular edema B. Macular hole C. Age-related macular degeneration D. Pattern dystrophy None 10. ABO: Posterior Segment What is the significance of the foveal avascular zone (FAZ) in retinal health? A. It is the primary site of aqueous humor drainage. B. It indicates the area of highest cone density and is critical for sharp central vision. C. It is a marker for retinal ischemia and neovascularization. D. It represents the peripheral boundary of the retina. None 1 out of 10 Time is Up! Time's up
