We report a case in which intraocular endoscopy clarified the cause of Ahmed glaucoma valve (AGV) failure with a cloudy cornea. A 42-year-old patient with glaucoma underwent AGV implant surgery to treat secondary glaucoma due to chronic iridocyclitis in his left eye. After AGV. he developed bullous keratopathy (BK) in that eye. https://www.roneverhart.com/Willett-Pot-Still-Reserve-Bourbon-50ml-Miniature/