A lens case can collect residue and microorganisms over time, even when it looks clean. Good case care starts with following the instructions supplied with your lens solution and advice from your practitioner. After storing lenses, empty the case rather than adding fresh solution on top of old solution. Clean or rinse it only in the way directed for your product, and allow it to air-dry as recommended. Never use tap water to rinse a lens case.
Replace the case on the schedule advised by your eye care professional or the solution manufacturer. Some solutions include a replacement case and specific directions; follow those instructions rather than relying on appearance alone. A cracked, damaged, or persistently dirty case should not be used. Keep the case capped when appropriate and store it in a clean, dry place away from splashes, cosmetics, and other sources of contamination.
Daily disposable lens wearers generally do not need a storage case for routine use, but a case may be useful in a practitioner-approved situation. It should still be clean and handled hygienically. Do not move lenses into an old case with an unknown history or use a case as a substitute for the correct solution. If you have recurring irritation or infection, discuss your full lens and case routine with a professional. Symptoms such as pain, redness, light sensitivity, or discharge warrant prompt advice.