Seg Height Measurement Tool

First for measuring the proper height of a progressive lens.

Seg height measurement tool.

There is a new twist on the old subject of measuring seg heights and progressive lens verification. 35215 t shaped pd ruler segment height gauge vigor ga215. Using various measurement tools that are in any skilled optician s toolbox she still takes precise a b dbl pd seg height vertex distance pantoscopic tilt and frame wrap angle measurements needed for contemporary free form lenses. The determined segment height is specific to each.

The twist is the pupil marker sometimes known as the white pen here s how the pupil marker is used for these two processes we do everyday. Use a ruler that has millimeter measurements. In short y stick removes the intimidation and subjectivity from seg height measuring said fischer. Ecps of all skill levels can now get the seg height right y stick is made in germany.

Segment height does not apply to single vision lenses. Second it reproduces the patient s eye height as an objective instrument so the optician can measure the seg height on the lens. Put the glasses on your face and adjust them so that they sit comfortably. Optometric lab lenses.

How to measure your segment height. Align 0 scale to bottom of lens to identify seg height. Segment height also known as seg height or sh is the vertical measurement in millimeters from the bottom of the lens in your frames to the beginning of the progressive addition on a progressive lens or the top line of a lined bifocal. Ruler circumference measure.

Segment height measurement gauge bifocal trifocal lens measuring vigor ga216 pack of 2. Apply like a sticker to the front surface of lens. Lab lenses lab supplies measuring devices height measuring sticker. Each sticker is reusable up to.