 this article describes an unusual increase in fungal endophthalmitis cases in november 2020 after cataract surgery was reported to the korea disease control and prevention agency south korea an outbreak investigation was initiated to identify the cause most case patients were exposed during surgery to ocular viscoelastic devices ovds from the same manufacturer company a it was determined this fungal endophthalmitis outbreak was caused by a contaminated lot of ovds and recommended discontinued use of this product early recognition of outbreaks and joint responses from related government agencies can reduce risk for fungal endophthalmitis 