Seg Height Measurement Tool

How to measure your segment height.

Seg height measurement tool.

Second it reproduces the patient s eye height as an objective instrument so the optician can measure the seg height on the lens. There is a new twist on the old subject of measuring seg heights and progressive lens verification. Use a ruler that has millimeter measurements. 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. In short y stick removes the intimidation and subjectivity from seg height measuring said fischer. 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. Put the glasses on your face and adjust them so that they sit comfortably.

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. Apply like a sticker to the front surface of lens. First for measuring the proper height of a progressive lens. Ruler circumference measure.

Segment height does not apply to single vision lenses. Optometric lab lenses. 35215 t shaped pd ruler segment height gauge vigor ga215. Ecps of all skill levels can now get the seg height right y stick is made in germany.

35215d t shaped pd ruler segment height gauge pack of 12. The determined segment height is specific to each. Measuring devices seg height instruments seg hi measuring gauge seg hi measuring gauge please sign in to order this item. You can also use a ruler with centimeter measurements and simply times the result by 10 to get your millimeter measurement.