C-size refers to which aspect of the lens?

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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

C-size refers to which aspect of the lens?

Explanation:
C-size indicates the circumference of the edged lens. It reflects how much edge material surrounds the lens as it’s edged to fit the frame, which is important for proper seating, beveling, and overall fit in the rim or rimless setup. This is different from the bridge width (the distance between the lenses across the nose), the temple length (the length of the temple arms), or any nose-gap measurement.

C-size indicates the circumference of the edged lens. It reflects how much edge material surrounds the lens as it’s edged to fit the frame, which is important for proper seating, beveling, and overall fit in the rim or rimless setup. This is different from the bridge width (the distance between the lenses across the nose), the temple length (the length of the temple arms), or any nose-gap measurement.

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