Flexible steel with engraved millimeter scales.

Tapered end fits into eyewire groove for accurate readings. 6-1/4" long by 15/32" wide.

Rules To Abide By

"A PD rule can be much more than a simple measuring stick. Check out the features on our selection of rules. You will surely find one that makes your dispensing or lab task easier and more accurate. All American made where a 70mm reading on the scale is 70mm in reality."

See other options below, or view all PD Rules

Sturdy white plastic with both millimeter and inch scales in black.

Beveled for comfort. 6-1/4" long by 37/64" wide.

Rules To Abide By

"A PD rule can be much more than a simple measuring stick. Check out the features on our selection of rules. You will surely find one that makes your dispensing or lab task easier and more accurate. All American made where a 70mm reading on the scale is 70mm in reality."

See other options below, or view all PD Rules

Sturdy white plastic with millimeter scales in black.

Millimeter markings read in the same direction for accurate PD measurements. 7-1/4" long by 11/16" wide.

Rules To Abide By

"A PD rule can be much more than a simple measuring stick. Check out the features on our selection of rules. You will surely find one that makes your dispensing or lab task easier and more accurate. All American made where a 70mm reading on the scale is 70mm in reality."

See other options below, or view all PD Rules

Sturdy red plastic with both millimeter and inch scales in white.

The ends of this rule are notched for easy and accurate eyewire measurements. White numbers on red field run in opposition so that the rule always reads in the correct direction. 7-1/4" long by 11/16" wide.

Rules To Abide By

"A PD rule can be much more than a simple measuring stick. Check out the features on our selection of rules. You will surely find one that makes your dispensing or lab task easier and more accurate. All American made where a 70mm reading on the scale is 70mm in reality."

See other options below, or view all PD Rules

Curves Worth Knowing.

The higher the patient’s Rx, the more important the base curve be specified in the Rx. A dramatic change in the curvature can cause the patient problems. This clock provides precise curvature measurements on glass and plastic lenses. Rounded steel tips prevent scratched lenses. +\-20 diopters. Self-adjustable re-calibration.