Get Ready: Find a clean space and a small screwdriver. Take Out Old Lenses: Unscrew the screws or unclip the lenses carefully. Clean the Glasses: Wipe the frame gently with a clean cloth. Put in New Lenses: Place the new lenses in the frame carefully. Secure Them: If there are screws, tighten them. If not, make sure the lenses are snapped in securely. Check Fit: Put the glasses on and see if they feel comfortable. Final Check: Look over the glasses to make sure everything looks good. That’s it! You’ve replaced the lenses in your glasses. If you need help, ask someone or go to an eyeglass store.