TV-2X Are Low Vision Aids to assist with watching television. They are designed to work from a normal TV viewing distance of 9ft-16ft, and with a direct view as the magnification reduces the field of view to 19 degrees. Each eye has adjustable focus +-3 Diopter for maximum clarity and adjust to varied eye requirements. These are not for close or distant viewing and work best when used when sitting directly behind Television at a distance of 9ft-16ft. Comes in padded zippered case for safe keeping and storage.