The short answer is…they can be safe!
Costume contact lenses – also known as cosmetic or decorative contact lenses – are contact lenses that change how your eyes look. These contact lenses can make your eyes look different in many ways, from changing the eye’s color or pupil shape to giving cartoon or film character effects. They can be made with or without vision correction.
Costume contacts can be worn safely if you see a doctor first and follow their advice. Remember that contact lenses are medical devices that require a commitment to proper wear and care by the wearer.
If not used correctly, all contact lenses can increase your chance of an eye infection. The best way to ensure safety when using contact lenses is to see a doctor first. They can measure your eyes for properly fit contacts, assess whether or not you are a good candidate for contacts, and offer safety tips. After you have received a prescription, be sure to only buy costume contacts from retailers who require a prescription to purchase the lenses and who only sell FDA-approved contact lenses.