Entropion is a common eyelid malposition in which the margin turns inward against the globe. If untreated, this condition can cause irritative symptoms like ocular discomfort, corneal abrasion, microbial keratitis, corneal vascularization, and visual loss. It may be classified as cicatricial, congenital, acute spastic and involutional. Involutional entropion is the most common type seen in general ophthalmic practice and its prevalence is increasing as the population ages. There are several treatment strategies including nonsurgical and surgical procedures. This paper describes the surgical techniques most commonly used to treat entropion: everting sutures (Quickert), transverse blepharotomy and marginal rotation (Weis procedure), orbicularis transfer technique, tarsal strip, and advancement of the lower lid retractors.