Flexzion Prism Eye Glasses Periscope Eyeglasses Horizontal Spectacles Lazy Specs High Definition for Lying Down Bed in Watching TV Reading Book in Black High definition, easily watch TV or read while lying in bed Great for preventing neck cramps or eye strain. Turn your view to a downward 90 degree angle, eliminating the need for head movement Enjoy a clear view without moving your head. Glasses are light weight and great for travel on a plain, car, train, etc. Universal and myopia usable, you can wear presbyopic glasses presbyopic glasses, then wear the prism glasses Used for both youngsters and old people,great for the bedridden and hospital patients