What is the recommended method for cleaning residue from gas permeable lenses?

The recommended method for cleaning residue from gas permeable lenses is saline. Saline solution is specifically designed for use with contact lenses and helps to safely remove debris and build-up without damaging the lens material. This solution is sterile and isotonic, which means it matches the body's natural salt concentration, making it safe for the eyes. Using saline helps to maintain the integrity of the gas permeable lenses while effectively cleaning them.

Other cleaning agents like rubbing alcohol can be too harsh and may damage the lens material or leave residues that could irritate the eyes. Tap water is not advisable either, as it can introduce bacteria and microorganisms that could lead to infections or complications when lenses are worn. Sodium chloride solution, while similar to saline, is often more concentrated and not necessarily formulated for lens care, making it less appropriate for cleaning purpose. Saline stands out as the safest and most effective option for maintaining the cleanliness and health of gas permeable contact lenses.