Contact Us ▼

PDCapture: FramesDirect's PD Measurement Service

Simply Follow These Steps

  • Place an order for prescription eyeglasses or prescription sunglasses on (Valid order required.
  • Remove your eyeglasses.
  • Place a CD/DVD under your chin holding it straight up and down, with the label side facing the camera. (See photo)
  • Take a photo close enough to capture a FULL view of your head and the CD/DVD. Be sure to look straight ahead.
  • Send photo to Don't forget to include your order number in the subject line!
CD Placement Example


Dr. Dhavid Cooper

Dr. , Co-Founder of, has created PDCaptureSM, a pupil distance measuring tool. The tool uses facial-recognition software and complex mathematical algorithms to detect a two-dimensional object from a photo accurately and consistently. Pupillary distance measurements are made in less than a second.

Behind the Technology

PD Information

FramesDirect is able to measure a patients' PD (Pupillary Distance) instantaneously from a photograph. Using proprietary facial recognition and imaging technologies, the system automatically recognizes known objects and reflections from the cornea, called Purkinje images.

If no Purkinje image is available, the system is able to recognize the borders of the iris to accomplish the same stunning level of accuracy.

Pupil distance measurements are taken at the time of an eye examination. Occasionally the PD information is omitted on an eyeglass prescription.

Now, getting a PD measurement as accurate as the doctor's can be done from the convenience of your computer.

Shop Eyeglasses »Shop Sunglasses »Shop Rx Sunglasses »

How to Measure PD
Send Us An Email
Our Certified Opticians are available to help you find your perfect eyewear, confirm your prescription, and answer any other questions you may have. Please complete our contact us form.
Call Us
International Customers Call +1 512 402 8557
Monday—Thursday: 8:00am - 7:00pm Central   |   Friday: 8:00am - 6:00pm Central   |   Saturday: 8:00am - 5:00pm Central