Which lens category has some approval for extended wear?

Which lens category has some approval for extended wear?

• A. Monthly disposable lenses
• B. Daily disposable lenses
• C. Weekly disposable lenses
• D. Biweekly disposable lenses

Answer: (A)

Extended wear is possible only when the lens material can deliver enough oxygen to the cornea during sleep. Monthly disposable lenses include models that have earned extended wear approvals from manufacturers and regulators because they use higher-oxygen-permeability materials and designs suited for longer wear. Daily disposables are intended for one-day wear and aren’t approved for sleeping in. While some weekly or biweekly lenses can have extended wear approvals in certain cases, the category most commonly associated with extended wear options is monthly, making it the best answer.

Extended wear is possible only when the lens material can deliver enough oxygen to the cornea during sleep. Monthly disposable lenses include models that have earned extended wear approvals from manufacturers and regulators because they use higher-oxygen-permeability materials and designs suited for longer wear. Daily disposables are intended for one-day wear and aren’t approved for sleeping in. While some weekly or biweekly lenses can have extended wear approvals in certain cases, the category most commonly associated with extended wear options is monthly, making it the best answer.