What can eliminate RGP lens flexure?

Increasing the center thickness of a rigid gas permeable (RGP) lens is effective in eliminating lens flexure because a thicker lens generally resists deformation better than a thinner one. Lens flexure occurs when the lens bends or flexes under pressure, such as from eyelid movement or due to the natural curvature of the eye. When the center thickness is increased, it enhances the lens's rigidity and stability, allowing it to maintain its prescribed optical power more effectively despite external pressures. This is particularly important for patients with irregular corneas or those who require specific visual corrections, as it prevents fluctuations in vision quality that can arise from an unstable lens position.

While options such as reducing the power of the lens or choosing a larger diameter might influence the overall fit and performance of the lens, they do not directly address the issue of flexure in the same way that increasing center thickness does. Applying a lubricant is generally related to comfort and reducing friction between the lens and the eye, but does not provide a structural solution to lens flexure itself.