Who says quality glasses come with a price? At Zenni: the #1 online eyeglasses store, you’ll be surprised to find out quality can be affordable! To get the quality glasses at Zenni, having a prescription is a must! But sorry to say, Opticians don’t want give you PD data. and by doing this Opticians keep you away from ZenniOpt. Who can blame them? If they give out PD data, customers will be flocking to Zenni!