Contact lenses can be stored in water for any period. True or False?

• A. True
• B. False
• C. Only with distilled water
• D. Only with boiled water

Answer: (B)

Storing contact lenses in water is not safe. Water is not sterile and does not disinfect lenses, so even short exposure can introduce germs that can infect the eye, including harmful organisms like Acanthamoeba that can cause a serious and vision-threatening keratitis. Water can also cause lenses to swell or distort through osmotic changes, affecting fit and comfort. The correct practice is to keep lenses in fresh, approved lens solution in a clean case, and never store them in tap, distilled, or boiled water. Use the solution as directed, replace it regularly, and avoid rinsing or storing lenses in any form of water.