Eyelashes that Grow Inward: Trichiasis Causes, Treatment and More: "Eyelashes that brush up against your cornea -- the clear, front part of your eye -- for a long time could cause eye irritation or a more serious condition on the surface of your eye. That can lead to infection and scarring. It could even affect your eyesight.
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Treatment
There are many ways to treat trichiasis.
Your doctor may use little forceps to pluck out the pesky lashes. This is the most common way to treat it. He or she will numb your eyeball with drops and pull the lash out of its follicle. It usually comes out easily and doesn’t hurt.
You may need artificial teardrops for a couple of days. Your lashes will grow back in 3 to 5 months, but there’s still a chance they’ll come in the wrong way."