Liam has developed a chalazion.
A chalazion is a lump in the eyelid that is caused by inflammation of a gland within the skin. Typically, a chalazion goes away within a couple of weeks. If so, no long-term consequences occur. If the chalazion lasts for weeks or comes back, then your ophthalmologist evaluates whether the lump should be removed surgically. The lump is rarely associated with an infection or a form of skin cancer. (thanks to www.emedicinehealth.com)
Glad we could help everyone learn about another medical wonder. Thanks Liam.
Sidenote to Meg: Check out those eyebrows huh?!?