A 23-year-old woman is brought to the ED for vision loss in her left eye that began shortly after waking up in the morning. She states that she is very depressed since her father was diagnosed with terminal cancer. She was supposed to visit her father today in the hospital but is now in your ED because of her vision loss. Your physical examination is unremarkable. An evaluation by the ophthalmologist is also normal. A head computed tomographic (CT) scan is normal. Which of the following is the most likely diagnosis?

a. Somatization disorder

b. Conversion disorder

c. Hypochondriasis

d. Retinal detachment

e. Anxiety disorder