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P. Kalyani; Reversible Nyctalopia Caused by Vitamin A Deficiency After Bariatric Surgery. Invest. Ophthalmol. Vis. Sci. 2009;50(13):5315.
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To describe a patient with severe nyctalopia secondary to Vitamin A deficiency caused by gastric bypass surgery treated with high-dose Vitamin A.
Case Report. 38 year-old male who had previous gastric bypass surgery approximately 5 years ago presented with 1 week history of severe night blindness without any visual loss. Patient was evaluated using electroretinography (ERG) which revealed severely reduced scotopic response.
The patient was treated with intramuscular vitamin A 25,000 IU for 7 days followed by daily supplementation of oral vitamin A 10,000 IU. The patient’s ERG normalized within 8 weeks of treatment.
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