Which cleaner type is more effective at removing deposits?

• A. Non-abrasive
• B. Abrasive
• C. Both equally
• D. None

Answer: (B)

The main idea is that cleaning effectiveness comes from how the cleaner works. Abrasive cleaners include gritty particles that physically scrub deposits off the lens surface, so they generally remove deposits more aggressively than non-abrasive cleaners, which rely mainly on chemical action and gentler cleaning. That’s why the abrasive option is the best answer for being more effective at removing deposits.

Keep in mind, though, that scratching the lens surface is a risk with abrasive cleaners, so they’re not typically used for routine daily cleaning on gas permeable lenses and should be used under professional guidance for stubborn deposits. The non-abrasive option is gentler and safer for regular use, but may be less effective on heavier deposits. The idea that both are the same or that none work isn’t accurate, since cleaning action varies with the cleaner type.