Get the WebMD Daily newsletter for health tips, wellness updates and more.
By clicking "Subscribe," I agree to the WebMD Terms and Conditions and Privacy Policy. I also agree to receive emails from WebMD and I understand that I may opt out of WebMD subscriptions at any time.
Dr. Knox graduated from the Illinois College of Optometry in 1999. He works in Waterloo, IA and specializes in Optometry. Dr. Knox is affiliated with Covenant Medical Center.