Gas Permeable Contact Lenses 2026 Practice Test – Complete Guide to Lens Anatomy, Verification, and Selection Success

Think about how the lens interacts with the eyelids and tear film when you wear a gas-permeable lens. A plus power creates a steeper central curve to correct hyperopia, which changes how the lens sits on the cornea and how the lids move over it. The upward sweep and pressure from the upper lid during blinking, combined with the tear film dynamics, tends to push a plus-powered GP lens slightly downward, so it ends up sitting lower on the cornea with a bit more inferior bearing. That’s why plus GP lenses are described as tending to position lower.