]> 2026-07-31T07:28:17+00:00 WBR0149 0 en Diabetic retinopathy Glaucoma Cataract Vitamin deficiency Night blindness is one of the first signs of vitamin A deficiency. Vitamin A deficiency is common among patients with malabsorptive conditions, such as Crohn's disease. Genetic disease Biochemistry A 35-year-old woman presents to her ophthalmologist for impaired dark adaptation. Over the past month she has experienced increasing difficulty distinguishing objects, especially when driving home from work at night. Her past medical history is significant for severe Crohn's disease. She denies any family history of ocular disease. She reports her family history is only significant for essential hypertension in her father and dyslipidemia in her mother. On physical examination, the physician notes white patches on the oral mucosa. What is the most likely diagnosis? D General Principles 2020-10-27T23:29:38Z 2459150.478912 WBR0149