What is a potential long-term effect of incorrectly fitted rigid gas permeable (RGP) lenses?

When rigid gas permeable (RGP) lenses are improperly fitted, one of the notable long-term effects is corneal warpage. This condition arises when the lens does not align properly with the curvature of the cornea, leading to uneven pressure distribution across the surface of the eye. Over time, this misalignment can cause the cornea to deform, resulting in a change in its natural curvature, which may impact vision quality and overall ocular health.

Although RGP lenses are designed to provide excellent oxygen transmission and a stable vision correction, an improper fit can negate these benefits. Instead of facilitating a healthy, stable fit, it can lead to discomfort, fluctuating vision, and the possibility of astigmatism if warpage occurs. Proper fitting is crucial in maintaining corneal shape and ensuring comfort and visual clarity for the wearer.

In contrast, the other options do not represent potential long-term effects of poorly fitted RGP lenses. Decreased eye strain, improved visual acuity, and enhanced comfort are more likely associated with a well-fitted pair of lenses rather than the consequences of an incorrect fit.