How does pupil size influence lens choices?

• A. Larger pupils may require larger diameter or specific designs to minimize edge visibility and ensure stable vision in low light
• B. Pupil size does not influence lens selection
• C. Smaller pupils always require the same lens diameter
• D. Pupil size only affects wear time

Answer: (A)

Pupil size changes with lighting, and that affects how a soft lens sits on the eye. In dim light the pupil dilates, which can reveal the edge of a lens if the diameter isn’t large enough or if the edge design isn’t optimized. To keep vision stable and minimize edge visibility as the pupil expands, choosing a larger lens diameter or a design with an edge profile that travels well under the eyelids helps maintain proper centration and reduces light leakage or halos.

That’s why this choice is the best: it directly addresses how a bigger pupil in low light can influence the need for a bigger diameter or specialized lens designs to maintain comfortable, stable vision. The other ideas don’t capture how pupil changes drive both coverage of the iris and control of edge visibility, and they imply effects (like wear time) that aren’t the primary influence of pupil size.