To give you a well inform guide to what is best lens that will match to your prescription. You need to consider what type of frame you choose, for what purpose you want to use your eyeglasses, these are just a few factors you need to consider. You need to supply first, your basic prescription. It has to be complete with right and left power. If you are typing it or emailing it to us, make sure you put the plus or minus sign. Like this R:-1.00 sphere and L:-1.25 sphere or simply put R:-1.00 L:-1.25. Don't forget the add power if you need a reading power. So, you simply write R:-1.00 L:-1.25 add:+1.50. The equally important data is your pupil distance or PD.