What is one benefit of in-office polishing of a gas permeable lens?

In-office polishing of a gas permeable lens enhances comfort for the wearer, which is the primary reason this choice is correct. Polishing the lens creates a smoother surface by removing any rough edges or microscopic imperfections. A smoother lens surface can help reduce friction against the eyelid during blinking, ultimately contributing to a more comfortable wearing experience. This is particularly important for gas permeable lenses, as they tend to be less forgiving in terms of comfort compared to soft contact lenses.

The other options relate more to physical attributes or performance characteristics of the lens. For instance, polishing does not significantly alter the oxygen permeability of the lens—which is a crucial characteristic for corneal health—nor does it typically result in a thicker edge. In fact, polishing is often aimed at achieving a thinner, more streamlined edge to facilitate easier application and improve overall aesthetics. Thus, while other factors such as design and material influence the overall performance of the lens, the immediate benefit of in-office polishing is heightened comfort for the lens wearer.