What unit of measure is used for segment height?

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Prepare for the Shopko Optician Certification Test. Study with flashcards and multiple choice questions. Enhance your knowledge with detailed explanations and get ready to excel in your exam!

Multiple Choice

What unit of measure is used for segment height?

Explanation:
Segment height is the vertical size of the near-vision portion of a bifocal or progressive lens. Because this measurement is small and requires precise positioning, it’s expressed in millimeters. Millimeters provide the fine resolution needed for accurate fitting, while centimeters or inches would be too coarse for this purpose. Micrometers are far too tiny for everyday lens measurements and not practical here. So the unit used for segment height is millimeters.

Segment height is the vertical size of the near-vision portion of a bifocal or progressive lens. Because this measurement is small and requires precise positioning, it’s expressed in millimeters. Millimeters provide the fine resolution needed for accurate fitting, while centimeters or inches would be too coarse for this purpose. Micrometers are far too tiny for everyday lens measurements and not practical here. So the unit used for segment height is millimeters.

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