Which pair correctly completes the statement: The longest horizontal length is the frame measurement _____ and the lens measurement _____?

• A. A Measurement
• B. C Measurement
• C. Eyesize, Lens Size
• D. B Measurement

Answer: (C)

In eyewear sizing, the most important horizontal measurement is the eye size—the width of one lens, which is the frame’s opening. That same dimension is what defines the lens width, often called the lens size. So the longest horizontal length of the frame opening is the frame measurement eyesize, and the width of the actual lens is the lens measurement lens size. This is why the pair that fits best is eyesize for the frame and lens size for the lens. In practice, many frames use the same number for both, aligning the frame’s horizontal capacity with the lens width.