True or False: SCL solutions can be used with GPs, but GP solutions should not be used with SCLs.

• A. True
• B. False
• C. It depends on the solution brand
• D. Only under professional supervision

Answer: (A)

The main concept is that lens care solutions are not universally interchangeable because different lens materials react differently to disinfectants and cleaners. Scleral (soft) lens solutions are designed to be compatible with a wide range of lens types and are often milder in formulation, so they can be used to care for gas-permeable (GP) lenses without harming the rigid material. In contrast, solutions specifically formulated for GP lenses contain ingredients that are tailored to the rigidity and surface chemistry of GP materials; those same ingredients can leave residues, cause deposits, or irritate the eye if used with scleral lenses. Therefore, using scleral solutions with GP lenses is generally acceptable, while using GP-specific solutions with scleral lenses is not recommended. Always follow the manufacturer’s guidance and your clinician’s recommendations, as some brands may have explicit compatibility notes.