Eyelid surgery is necessary to repair Eyelid lacerations and remove masses along the eyelid in order to maintain normal function of the eyelids and prevent corneal damage. Abnormal conformation of the eyelids (for example: entropion - "rolling in" and ectropion - "rolling out") are common in certain dog breeds, but can also occur in other species. Surgery to correct the conformation of the eyelids helps to prevent corneal damage by keeping hair from contacting the cornea and helps to maintain healthy ocular surface tissues.