Gas Permeable Contact Lenses – Lens Fitting, Care, And Patient Education Practice Test

The key idea is that material rigidity protects against warpage. Hyper Dk GP lenses are rigid gas-permeable lenses, so they maintain their shape and resist deformation much more than soft lenses. Warpage tends to occur more readily when the material is soft and pliable, which is why soft contact lenses are more prone to it. While high oxygen permeability (high Dk) is a property about oxygen flow, it doesn’t make the lens soft; it keeps it rigid enough to resist warpage under normal care and wear. So the statement that they are less prone to warpage due to their rigidity is the best fit. The option suggesting they’re more prone because they’re soft contradicts the rigid nature of GP materials. Saying they never warp is incorrect because extreme heat or certain solutions can still cause deformation, and warpage is indeed related to how easily a material can deform. Finally, claiming warpage is unrelated to softness misses the clear link between material stiffness and deformation tendency.