Dr. Donald Blocker is an experienced optometrist serving patients in Portland, Tennessee. Dr. Blocker provides a full scope of vision care for both children and adults, and specializes in diagnosing and managing a variety of eye diseases, injuries, and disorders. At OPMT Vision Centers in Lebanon, Dr. Blocker offers a wide range of services, so whether you're coming in for a comprehensive eye exam or for treatments for chronic eye conditions like dry eye, Dr. Blocker will provide you with the highest quality eye care.