In the boxing system, what does the 'A measurement' represent?

In the boxing system, what does the 'A

Multiple choice — select the best answer

AThe vertical height of the lens opening
BThe horizontal width of the lens opening
CThe distance between lenses
DThe total frame width

✓ Correct answer: B. The horizontal width of the lens opening The A measurement (also called the eye size) is the horizontal width of the lens opening measured in the boxing system. It is one of the three key frame measurements (A, B, DBL).

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Topic: Frame Selection & Adjustment

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In the boxing system, what does the 'A measurement' represent?

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