Vision correction using eyeglasses has been very popular in many years. If you want to buy eye glasses, you need prescription. Prescription is not only a piece of paper, it’s also a proof of ocular conditions for those who want to buy a pair of glasses. If you want to know your pupillary distance (PD) or diopter of your eyes exactly, you should go to see an optometrist or ophthalmologist. He or she will test your eyes meticulously and give you a prescription. Only with this paper you are allowed to match glasses. Or the opticians will not grant a favor for you.
Now eye glasses can be bought online. You can look for stylish eyeglasses on Zenni: the #1 online eyeglasses store. PD is one considerable factor to buy eyeglasses. However, many opticians don’t want you to order online and Opticians keep you away from ZenniOpt. The Opticians don’t want give you PD data. The PD or Pupillary Distance, is the distance between the pupils of the eyes, center to center, in Millimeters. This data is needed in order to ensure proper eyeglass fitment. So get the accurate PD measurement today and order eyeglasses online.