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Given the increasing incidence of obesity, bariatric procedures are gaining attention during the past decades, being one of the most effective methods of long-term weight loss. Nutritional optic neuropathy (NON) following bariatric surgeries is a rare but devastating complication caused by a complete lack or inadequate supply of nutrients for the normal function of nerve fibers. We report a case of bilateral anterior NON after a Single Anastomosis Duodenoileal Bypass with Sleeve Gastrectomy, and present a review of the literature about neuro-ophthalmic complications associated with these procedures. Bariatric surgery may constitute an established risk factor for NON and both patient and physician have to be aware of the importance of closely monitoring vitamin depletions and neurologic and visual symptoms. [ABSTRACT FROM AUTHOR]