The larger optic zone diameter results in the lens fit being:

• A. Steeper
• B. Flatter
• C. No change
• D. Variable

Answer: (B)

When the optic zone diameter is made larger, more of the lens’ surface sits over the central part of the cornea. With the same peripheral design, this broader central contact reduces how aggressively the lens sits on the eye, so the sagittal height at the edge decreases. In other words, the lens tends to settle more shallowly on the cornea, giving a flatter overall fit.

A steeper fit would require more sagittal height or a tighter edge, which isn’t what happens when you simply enlarge the optic zone. The change is directional and predictable, so you don’t get no change or an unpredictable variation just from increasing the optic zone diameter.