How long can GP lenses be stored wet?

• A. 7 days
• B. 14 days
• C. 30 days
• D. 60 days

Answer: (C)

Gas-permeable lenses stored in a proper lens storage/disinfection solution in a clean case can be kept wet for up to about 30 days. After that window, the risk of microbial growth and solution degradation increases, so lenses should be re-disinfected and inspected or replaced before reuse. Always use the recommended storage solution (not plain water or saline alone), keep the case clean, and replace the case and solution as advised by the manufacturer. Shorter storage times (like 7 or 14 days) are unnecessarily conservative, while storage for 60 days exceeds the typical safety window.