carruthers is not the only one ringing the alarm bells about costume lenses. in recent years, health canada has begun classifying decorative contact lenses as medical devices due to their potential health risks. as a result, lenses must have a medical device licence and be labelled according to medical device regulations to be sold in canada.
on its website, health canada cautions that decorative contacts can cause cuts or scratches on the eye, allergic reactions, vision impairment, infections, and blindness.
those who want funky contacts can still buy and wear them safely, carruthers said. to do so, they should visit an eye care practitioner to have a lens fitting, purchase trustworthy contacts, and learn how to handle them properly.
although problem costume lenses tend to do damage around halloween, carruthers said they cause issues year-round. even those with transparent prescription contact lenses can face the same challenges if they order their contacts online without a proper fitting or instructions.
if you’ve already bought a pair of costume lenses, carruthers cautioned that it’s especially important to avoid falling asleep wearing them, since they might not provide oxygen to the eye. also, do not share your contact lenses with anyone else.