Which statement about GP lenses is true?

Which statement about GP lenses is true?

• A. They are easier to fit from stock
• B. GP lenses are smaller and can lead to greater movement
• C. They have no environmental limitations
• D. They never dropout due to discomfort

Answer: (C)

Gas permeable lenses are rigid, oxygen-permeable lenses that keep their shape on the eye, giving a stable and predictable fit. Because they don’t rely on hydration to maintain form, their performance tends to stay consistent across common environmental changes like normal variations in humidity or tear film dynamics. That robustness is why this statement is considered true: GP lenses aren’t as sensitive to environmental shifts as softer, hydrogel lenses. Of course, you still have to care for them properly—the cleaning solutions you use, solution compatibility, and storage conditions can affect comfort and lens integrity. But those factors are about lens care, not an inherent limitation of the lens material in typical environments. The other ideas don’t fit because GP lenses aren’t simply easier to fit from stock, aren’t inherently smaller and more prone to movement, and discomfort can still lead to dropout if the fit or wear conditions aren’t right.

Gas permeable lenses are rigid, oxygen-permeable lenses that keep their shape on the eye, giving a stable and predictable fit. Because they don’t rely on hydration to maintain form, their performance tends to stay consistent across common environmental changes like normal variations in humidity or tear film dynamics. That robustness is why this statement is considered true: GP lenses aren’t as sensitive to environmental shifts as softer, hydrogel lenses. Of course, you still have to care for them properly—the cleaning solutions you use, solution compatibility, and storage conditions can affect comfort and lens integrity. But those factors are about lens care, not an inherent limitation of the lens material in typical environments. The other ideas don’t fit because GP lenses aren’t simply easier to fit from stock, aren’t inherently smaller and more prone to movement, and discomfort can still lead to dropout if the fit or wear conditions aren’t right.