Retina Specialists in Warren, Edison & Piscataway, NJ Our Edison, Warren, and Piscataway eye physicians and staff are specially trained to handle all conditions of the retina and vitreous, including: Diabetic Retinopathy. Diabetic Retinopathy is the name of the blood vessel changes that usually occur without symptoms. Diabetic Retinopathy is the most common cause of blindness in the U.S. in ....