Gas permeable lens flexure may be eliminated by which of the following methods?

Gas permeable lens flexure occurs when the lens bends or flexes under mechanical forces, which can alter the fit and vision correction properties of the lens. Reducing sagittal vaulting addresses this issue by limiting the height of the lens profile, which can consequently minimize the amount of flexure experienced during wear.

When the sagittal depth of a gas permeable lens is reduced, the lens becomes flatter, resulting in a more stable fit against the cornea. This stability allows for less bending of the lens material, thus lessening the risk of flexure that could impair vision quality. A well-fitted lens with appropriate sagittal depth will distribute mechanical forces more evenly across the lens surface, contributing to enhanced stability and performance.

While there are other factors—like back curvature, center thickness, and material Dk—that can influence lens performance, they do not directly address the mechanical flexure mechanism as effectively as adjusting sagittal vaulting does. Therefore, choosing to reduce sagittal vaulting is the most effective method for minimizing flexure in gas permeable lenses.