Watch Where You Apply Your Eyeliner

Those who line their eyes may not have heard. A new study based on a small pilot experiment says that eyeliner application on the inner eyelid might contaminate the eye, leading to vision-related problems, according to thehuffingtonpost.

The study was confirmed by a University of Waterloo scientist Dr. Alison Ng. She says this is the first study to prove that some grains from the pencil eyeliner might shift into the eye, and used videos to record how to check and compare the amount of eyeliner particles pushing into the eye through the tear film, or the thin coating that protects the eye, after the make-up is applied in various styles.

Hence, if the eyeliner is applied within the lash line, about 15 and 30 per cent more particles moved into the eye's tear film, compared to applying the liner outside it. The makeup moved more quickly into the eye once the eyeliner was applied inside the lash line.

With the passing of time, the amount of eyeliner entering the tear film comes down, and after two hours, there was little eyeliner left. It can also alter the tear film, which adds to "discomfort".

It might include waxes, oils, silicones and natural gums, which will help the cosmetic to stick on in spite of "blinking, sweating and the secretion of natural oils". It might lead to eye irritation, redness, bacteria from the eyeliner, infections and blurred vision.

Those who wear contact lenses are the most likely to get eye problems, while giving the pencil a sharpness can also lead to infections. In many cases, the particles might get washed away within two hours but they may also stick to contact lenses, leading to greater discomfort and making it worse for sensitive or dry eyes, according to dailymail.