have been having triple vision for years , it seam to be in both eyes. when I cover them and look at black letters on white back ground it is very distinct and it is diagonal( up and to the right. my eye sight is better in the am than at night I am to the point I can t safely drive at night. My eye doctor think it is dry eye problems and with eye drop for a it helps for few seconds. he has prescribed a thick eye solution and I have gave up on using it because it just don t work.