The College of Optometrists is issuing a warning ahead of Halloween, advising against wearing novelty cosmetic contact lenses unless they have been supplied by an optometrist. Many people are unaware of the health risks associated with these lenses, as well as the fact that it is illegal to purchase contact lenses from sources other than registered health professionals. Dr Paramdeep Bilkhu, a clinical adviser at The College, explains that costume lenses are often bought online by individuals who are not regular contact lens wearers. This lack of knowledge about the safety and proper care of the lenses, combined with the potential for poor quality materials, poses a risk of sight-threatening eye infections. Additionally, the lenses may not align correctly with the wearer’s pupil if not fitted properly, which can impair vision and be dangerous, especially while driving. It is important to prioritize eye health and consult with an optometrist when considering novelty contact lenses for Halloween.