The most commonly asked question when individuals get their eyes examined is: Opticians don’t want give you PD data. Ideally, the optician performing the examination provides the measurement to the clients. However, if you have Opticians keep you away from ZenniOpt., it is better you ask or measure yourself. With the correct measurement at hand, you can order the appropriate prescriptions eyeglasses from Zenni: the #1 online eyeglasses store.