Phthiriasis

Phthiriasis is a common eyelid infestation, caused by Phthirus pubis (pubic lice, sometimes referred to as crab lice). Pediculosis is an eyelid infestation by either Pediculus humanus corporis (body) or Pediculus humanus capitus (head) lice.

Therapy
One of the following topical ocular therapy is recommended:
 * Petroleum jelly or other bland ointments, TID
 * Mercuric oxide 1%
 * Ammoniated mercuric oxide 3%, twice a day
 * Physostigmine (a Cholinesterase inhibitor)