Combined Nutritional Keratoconjunctivitis Sicca and Optic Neuropathy due to Restrictive Dietary Multivitamin Deficiency of Vitamin C and B12 During the COVID-19 Pandemic
1 McGovern Medical School at The University of Texas Health Science Center at Houston (UTHealth) (JZF), Houston, Texas; Department of Ophthalmology (PWM, SR, AGL), Blanton Eye Institute, Houston Methodist Hospital, Houston, Texas; Departments of Ophthalmology, Neurology, and Neurosurgery (AGL), Weill Cornell Medicine, New York, New York; Department of Ophthalmology (AGL), University of Texas Medical Branch, Galveston, Texas; University of Texas MD Anderson Cancer Center (AGL), Houston, Texas; Texas A and M College of Medicine (AGL), UTMB and UT MD Anderson Cancer Center, Bryan, Texas; Department of Ophthalmology (AGL), Baylor College of Medicine and the Center for Space Medicine, The University of Iowa Hospitals and Clinics, Iowa City, Iowa; and University of Buffalo (AGL), Buffalo, NY.