You may want to think twice before applying eyeliner. A new study from the Center for Contact Lens Research at the University of Waterloo in Canada has found that penciling your inner eyelid increases the risk that particles will get into the eye itself and can possibly create vision problems.

For the study, volunteers first applied glitter eyeliner outside the lash line and then on the inner lid closer to the eye. Within five minutes, 15 to 30 percent more eyeliner particles moved into the eye's tear film (the coating protecting the eye) when eyeliner was applied to the inner eyelid compared to when it was applied to outside the lash line.

Alison Ng, lead researcher from the Center for Contact Lens Research at the University of Waterloo in Canada, says particles also move more quickly into the eye itself when eyeliner is applied inside the lash line.

If you are going to wear eyeliner, here are some tips. "If you thoroughly sharpen your pencil eyeliner before each application and get rid of the stuff that's stuck to the end, you'll have a fresh tip which can help prevent infection," said Ng in a university news release. Ng also suggests that you should remove eye makeup before bed.

The FDA also offers some suggestions on how to avoid infections. These include not sharing your makeup, paying attention to ingredients and keeping away from kohl (which is not approved for cosmetic use in the US), making sure your hands are clean when you apply and never, ever, using lip liner as eye-liner! Do you have any other tips?



  1. HealthDay: Be Careful With That Eyeliner
  2. University of Waterloo: Study finds eyeliner application may cause eye problems