An 11-year-old boy of East-Asian descent presented to the hospital with an 8-month history of progressive vision loss, night blindness, and light sensitivity. He also had a long-standing complaint of dry eyes. His medical history included diagnoses of eczema and multiple food allergies. Owing to concerns about food triggers of his eczema, the child had a restrictive diet consisting solely of potato, pork, lamb, apples, cucumber, and Cheerios. There was no history of redness, discharge, or trauma to the eyes. The vision loss was not associated with pain, headache, fever, or photopsias (flashes of light).