Ectropion is a common eyelid malposition characterized by outward turning of the eyelid margin, resulting in conjunctival exposure, epiphora, and potential corneal damage. The most common form of ectropion that needs surgical intervention affects elderly patients through horizontal eyelid laxity. This video article demonstrates the lateral tarsal strip (LTS) procedure, which corrects horizontal eyelid laxity by repositioning and reinforcing the lower eyelid, resulting in durable outcomes with minimal postoperative discomfort and low recurrence rates. The LTS procedure stands as the preferred surgical method for treating involutional ectropion because of its straightforward technique and excellent outcomes.