The type of lens you choose should be determined by whether you want to use your glasses for all activities or only for one.

Single Vision Lenses 

If you are under 40 years old and need corrective eyewear, then single vision lenses best matches your individual vision needs.A single vision lens has the same power of correction across its whole surface.

Progressive Lenses

Progressive lenses provide a seamless progression of many lens powers in different range of vision. You can look up to see clearly across the room- From distance to arm’s length to near.

If you are in your 40s (or older) and have presbyopia, then progressive lenses offer a younger-looking appearance and allow you to see all ranges of vision clearly,  only with a pair of lenses.