What is the replacement frequency for GP lenses?

• A. Monthly
• B. Annually
• C. Every 2 years
• D. Every 6 months

Answer: (B)

Annual replacement is the typical frequency for gas-permeable lenses. Rigid gas-permeable lenses are durable and cleanable, so they don’t need to be changed as often as soft lenses. However, over time the lens surface can accumulate deposits, develop micro-scratches, or show edge wear that can affect comfort, vision, and how the lens fits on the eye. Replacing once a year helps maintain a smooth surface, reliable vision, and healthy interaction with the cornea, while also letting you catch any cracks or warpage early and keep up with hygiene needs. More frequent replacements would add unnecessary cost and waste for most wearers, and longer intervals could allow defects or deposits to impact comfort and eye health.