Dust and grit can scratch eyeglass lenses if they are rubbed across a dry surface. When possible, rinse the glasses with clean, lukewarm water before cleaning, then use a small amount of lens-safe cleaner or mild soap if recommended for your lenses. Dry them with a clean microfiber cloth. Avoid tissues, clothing, paper towels, and harsh household cleaners, which may scratch lenses or damage coatings and frame finishes.
Handle glasses by the frame rather than pulling on one temple, which can gradually loosen or bend the fit. When you are not wearing them, place them in a protective case instead of leaving them lens-down on a table. Keep glasses away from high heat, such as a hot car dashboard, because heat can affect some lens coatings and frame materials. Clean the cloth regularly according to its care instructions so it does not hold grit or oils.
If frames become crooked, loose, or uncomfortable, ask an optician to adjust them rather than bending them yourself. Small changes around the nose or ears can affect stability and how you look through the lenses. Check screws and hinges periodically, but avoid household glue or tools that may cause further damage. Scratched lenses generally cannot be made clear again by polishing; ask a professional whether replacement is needed. Good care supports daily comfort but does not replace regular eye exams.