MyUV Progressive lens with 3 powers in one pair When you switch between activities such as reading books and working on your computer, you don't need to change glasses at all times. The Multi-Focused Reading Glass contains three power to a pair of reading glasses, so you can read, write to your computer and socialize with others without having to remove your glasses. The third bottom can be used as your normal reader. This is the power you will buy. The middle one third is less powerful and can be used for example on the computer. and one third is the weakest part and can be used on all sides of the room or for distance.