Chapter 10. Vision
A visual exam in an 80-year-old man shows he has a reduced ability to see objects in the upper and lower quadrants of the left visual fields of both eyes but some vision remains in the central regions of the visual field. The diagnosis is
B. heteronymous hemianopia with macular sparing.
C. lesion of the optic chiasm.
D. homonymous hemianopia with macular sparing.
A 45-year-old woman who had never needed to wear glasses had trouble reading a menu in a dimly-lit restaurant. She then recalled that as of late she needed to have the newspaper closer to her eyes to read it. Her ophthalmologist told her she was experiencing age-related loss of accommodation for near vision (presbyopis) that is due to
A. the inability to increase the tension on the lens ligaments.
B. the inability to increase the curvature of the lens.
C. relaxation of the sphincter muscle of the iris.
D. contraction of the ciliary muscle.
E. increased softness of the lens.
A 28-year-old man with severe myopia made an appointment to see his ophthalmologist when he began to notice flashing lights and floaters in his visual field. He was diagnosed with a retinal detachment. The inner nuclear layer of the retina is comprised of
A. the inner segments of the photoreceptors (rods and cones).
B. various types of ganglion cells.
C. bipolar cells, horizontal cells, and amacrine cells.
D. glial cells that generate new rods and cones.
E. cell bodies of the optic nerve.
A 65-year-old woman was diagnosed with dry age-related macular degeneration with a foveal-sparing scotoma. The fovea of the eye
A. has the lowest light threshold.
B. is the region of highest visual acuity.
C. contains only red and green cones.
E. is situated over the head of the optic nerve.
A 62-year-old man went to his ophthalmologist for his routine eye ...