Which statement correctly reflects the GP lens material options?

Which statement correctly reflects the GP lens material options?

• A. UV blockers, plasma treatment, high refractive index
• B. Only silicone-based polymers
• C. GP lenses are always soft
• D. No surface treatments are used

Answer: (A)

Gas-permeable lens materials are designed to be hard while still letting oxygen pass through and providing good optical control. A common way to tailor these lenses is to add UV blockers into the polymer to reduce UV exposure to the cornea, though you still wear sunglasses for full UV protection. Surface science also plays a key role: plasma treatment is used to modify the lens surface, increasing wettability and helping tear film spread, which enhances comfort and reduces deposits. Finally, using a higher refractive index material lets the same prescription be achieved with a thinner lens, improving optics and comfort. So a statement that includes UV blockers, plasma treatment, and high refractive index represents typical GP material options.

Gas-permeable lens materials are designed to be hard while still letting oxygen pass through and providing good optical control. A common way to tailor these lenses is to add UV blockers into the polymer to reduce UV exposure to the cornea, though you still wear sunglasses for full UV protection. Surface science also plays a key role: plasma treatment is used to modify the lens surface, increasing wettability and helping tear film spread, which enhances comfort and reduces deposits. Finally, using a higher refractive index material lets the same prescription be achieved with a thinner lens, improving optics and comfort. So a statement that includes UV blockers, plasma treatment, and high refractive index represents typical GP material options.