Colored contact lenses change or enhance eye appearance, but they are still lenses worn directly on the eye. They can be made with or without vision correction, and either kind can cause problems if the fit or handling is unsuitable. A lens that appears to match your eye color or seems to fit a friend may not fit your eyes. Have an eye care professional assess your eyes and provide the appropriate prescription and fitting guidance before wearing colored lenses.
Buy lenses only through legitimate channels that require a valid prescription where applicable and provide the exact product prescribed. Avoid costume lenses sold without fitting information, including products marketed for parties or special effects. Do not share lenses, even briefly, and do not assume that a sealed package guarantees the lens is suitable. Check packaging and instructions, and ask a practitioner if product details or compatibility with your prescription are unclear.
Use colored lenses only for the approved wear period and follow the same hygiene rules as other contact lenses. Keep them away from water, avoid sleeping in them unless specifically prescribed, and never swap or extend replacement schedules. Remove them if vision becomes blurred or the eye feels irritated. Pain, redness, light sensitivity, discharge, or sudden vision changes needs prompt professional attention. Style should never take priority over a safe fit and healthy eye habits.