What are the benefits of using re-wetting drops with GP lenses?

• A. Decreases tear production
• B. Reduces wettability
• C. Increases Wettability and helps rinse debris
• D. Increases deposits

Answer: (C)

Re-wetting drops are used with gas-permeable lenses to keep the lens surface and the overlying tear film nicely lubricated. The key benefit is improved wettability: the tear film can spread smoothly over the lens, reducing friction during blinking and making wear more comfortable. In addition, these drops help rinse debris and loose deposits from the lens surface as you blink, which helps keep the lens surface cleaner and reduces irritation from particles or mucus.

They do not reduce tear production, and they do not worsen wettability. They are not intended to increase deposits; rather, they support a smoother, cleaner surface by aiding debris removal. So the best description is that re-wetting drops increase wettability and help rinse debris.