I was misdiagnosed that I had AMD (see Amsler grid which is used to determine Macular Degeneration of the Retina (AMD).    If AMD is present the lines appeared wavy or absent, the center appears blurry.  When I stared at it the lines they were double or triple and it appeared almost like a plaid where some lines were more prominent.  See a retinal specialist if you get a diagnosis of AMD.  If you suddenly lose your central vision see an opthamoloist right away. My vision problems are cataracts.  Who thought I would be happy to have cataracts. For your eyes- keep a healthy weight, don't eat a lot of fatty foods, take a one a day vitamin, wear sunglasses and avoid smoking and drinking.  At least - do as many as you can which I will do.  Take the time to enjoy the view.