What method can be used to loosen the fit on a rigid gas permeable (RGP) lens?

Flattening the peripheral curves of a rigid gas permeable (RGP) lens effectively loosens its fit on the cornea. The peripheral curves are designed to create a relationship between the lens and the sclera. By flattening these curves, the overall fit becomes less restrictive, allowing for a more comfortable and less snug application when the lens is placed on the eye. This adjustment decreases the amount of suction and creates more space at the lens edge, which can help with comfort during wear and ensure better tear exchange underneath the lens.

In contrast, simply increasing the lens diameter may not always lead to a looser fit if the overall shape of the lens remains unchanged. Adding a front curve typically affects the curvature of the lens, which can alter the fit but not necessarily in a way that loosens it. Switching to a softer lens changes the material properties but does not address the specific geometrical fit of the RGP lens currently in use and might not be relevant in cases where the original material was chosen for its specific benefits.