How To Measure Pupil Distance Online. A) measure (in mm) from the centre of one pupil to the centre of the other (see image below) How to measure pupillary distance your eye care professional typically measures pd as part of your eye exam using a pupillary distance ruler or a corneal reflex pupillometer, calibrated specifically to each eye.
Please visit this page on a desktop or laptop device. Open your left eye and close your right. This is another useful test that we offer clients.
The mm line that lines up to the center of your right pupil is your pd.
If you measure your own pd, we still recommend using our pd measurement tool to ensure the most accurate measurement for your prescription glasses. You may measure it yourself in the mirror or have a friend help you for more accurate measurements. The mm line that lines up to the center of your right pupil is your pd. How to measure your pd?