A dimension or frame eye size is the largest horizontal measurement.

A dimension or frame eye size is the largest horizontal measurement.

• A. A dimension
• B. B dimension
• C. Eye size
• D. Frame width

Answer: (A)

In frame sizing, the widest horizontal span of a single lens is the A dimension. This is also called the eye size, and it represents the largest horizontal measurement of the frame because it measures across one lens from edge to edge. The vertical dimension (B) is the lens height, which affects how tall the lens appears and how the frame sits vertically. The frame width is the overall front width of the glasses, including both lenses and the bridge, and it’s not the single-lens horizontal measurement. So the term that matches the description of the largest horizontal measurement is the A dimension, or eye size.

In frame sizing, the widest horizontal span of a single lens is the A dimension. This is also called the eye size, and it represents the largest horizontal measurement of the frame because it measures across one lens from edge to edge. The vertical dimension (B) is the lens height, which affects how tall the lens appears and how the frame sits vertically. The frame width is the overall front width of the glasses, including both lenses and the bridge, and it’s not the single-lens horizontal measurement. So the term that matches the description of the largest horizontal measurement is the A dimension, or eye size.