Good eyelid hygiene will help prevent chalazions. The lashes and eyelids should be cleaned daily and all eye makeup completely removed.
If the chalazion is left untreated, the eyelid can be permanently scarred, resulting in lost or crooked eyelashes. A large, untreated chalazion can cause astigmatism and blurred vision.
A chalazion is not contagious and presents no risk to others.