What is a lens blank?

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Prepare for the Ophthalmic Optics Exam. Study with flashcards and multiple choice questions, each question has hints and explanations. Get ready for your exam!

Multiple Choice

What is a lens blank?

Explanation:
A lens blank is the starting piece of lens material used to make ophthalmic lenses. It’s an unedged, unmounted slab (plastic or glass) that already has the basic diameter and a preformed curvature, but it hasn’t been ground to the final prescription, polished, edged to fit a frame, or mounted. It serves as the raw material from which the finished lenses are produced. It isn’t a finished lens, isn’t a spare, and isn’t the backside of a lens.

A lens blank is the starting piece of lens material used to make ophthalmic lenses. It’s an unedged, unmounted slab (plastic or glass) that already has the basic diameter and a preformed curvature, but it hasn’t been ground to the final prescription, polished, edged to fit a frame, or mounted. It serves as the raw material from which the finished lenses are produced. It isn’t a finished lens, isn’t a spare, and isn’t the backside of a lens.

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