The types of trichiasis can be divided into two categories. One type is simple trichiasis, where the eyelashes grow inward. Its treatment can be through electrolysis, which involves using an electric needle to destroy the hair follicle before plucking it out, preventing future eyelash growth from that follicle. The other type is caused by entropion of the eyelid, which requires corrective surgery for the inward-turning eyelid, involving an incision in the skin. Therefore, treatment of this type of trichiasis will result in scars on the skin.