When you don’t have you latest prescription, the optician may need to know your old eyeglasses Rx for producing the new pair, so, do you know how can they do it? Actually, they have the special machine which can measure the SPH, CYL and ADD of your eyeglasses, and you just need to put the center of the lens on the contact device, which will give the detailed parameter of your lens. Please choose lens package A 1.50 index lenses which is free after you choose the frame you like, then enter PLANO as your both eye prescription. Then you will see the Anti-glare (anti-reflective coating)option button to be chosen.