What are the benefits of using a disinfectant system?

• A. Enhances wettability, maintains lenses in hydrated state, and acts as a mechanical buffer
• B. Those with preservative sensitivities
• C. Reduces comfort during wear
• D. Increases lens weight permanently

Answer: (A)

Disinfectant systems do more than just clean; they actively support the lens surface and tear film. They enhance wettability, meaning the tear film spreads more easily across the lens, reducing friction with blinking and improving comfort. They help keep the lens hydrated by leaving behind lubricating or hydrating agents that maintain moisture between cleaning and wear, which helps prevent drying and rigidity. They also provide a buffering effect, helping stabilize pH and ionic conditions around the lens, which supports surface integrity and can reduce deposits or surface changes that feel gritty or uncomfortable.

The other choices describe outcomes that aren’t benefits of a disinfectant system. They don’t capture the positive effects on surface interaction and comfort, and one option even implies a negative outcome (reduced comfort) or an undesirable physical change (permanent weight gain), which aren’t characteristics of proper disinfectant systems.