A 32-year-old woman with no significant medical history presents to the clinic with visual complaints. On a recent trip to Arizona, she suffered an acute episode of visual impairment. She experienced blurred and double vision, which made it difficult for her to drive. On visual examination, her vision is 20/20 in both eyes. When she is asked to look to the right, her left eye only reaches midline while her right eye shows a beating nystagmus. Testing for visual convergence is intact. Based on the clinical history and physical examination, what is the most likely cause of her complaints?
A. Amaurosis fugax
B. Cataract
C. Multiple sclerosis
D. Optic neuritis
E. Panophthalmitis
A. Amaurosis fugax
B. Cataract
C. Multiple sclerosis
D. Optic neuritis
E. Panophthalmitis