What term describes the distance across the GP lens from edge to edge?

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Multiple Choice

What term describes the distance across the GP lens from edge to edge?

Explanation:
The distance across a GP lens from edge to edge is known as the overall diameter. This measures the full width of the lens, from one rim to the opposite rim, and it tells you how much of the cornea and sclera the lens covers. The other terms describe different features: the optic zone diameter is the size of the central optical area that provides vision, not the total width; the radius of curvature is the back-surface curvature that fits the cornea; and the front optic zone diameter refers to the diameter of the optical area on the lens’s front surface, which isn’t the edge-to-edge span. So the edge-to-edge width is the overall diameter.

The distance across a GP lens from edge to edge is known as the overall diameter. This measures the full width of the lens, from one rim to the opposite rim, and it tells you how much of the cornea and sclera the lens covers. The other terms describe different features: the optic zone diameter is the size of the central optical area that provides vision, not the total width; the radius of curvature is the back-surface curvature that fits the cornea; and the front optic zone diameter refers to the diameter of the optical area on the lens’s front surface, which isn’t the edge-to-edge span. So the edge-to-edge width is the overall diameter.

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