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Description
premium material for long time use. Put the notch over your nose, as close to your eyes as you can, then find the middle if your pupils in a mirror, read the line closest to the middle of the pupils.
. They help you to measure all lengths of your optical frames
Features
-Color: As Shown
-Material: Plastic
-Size:18.00X2.50X0.10cm/7.07X0.98X0.04in
-In the process of optometry, they are used to measure the distance between the eyes of the human eye and the height of the pupil to the bottom of the lens.
-Optical PD ruler helps you measure precisely the distance between your pupils.
-Professional and practical design with beautiful appearance, easy to carry and use.
-Eye distance rulers are suitable for personal or professional use, with clear scale.
-The ruler measures the vision and gives you accuracy in measuring left and right eye visions.
pd