Objective: To compare the long-term success, recurrence, and complication rate of involutional entropion surgery using the lateral tarsal strip and everting sutures when performed by surgeons in training (resident or fellow) and specialist oculoplastic surgeons (attending supervising physician). Design: Prospective, interventional, comparative, clinical case series. Participants: Adult patients with involutional entropion. Methods: Lateral tarsal strip and everting sutures (LTS+ES) by residents, fellows, or attending supervising physician. A minimum of 12 months of postoperative follow-up was required. Main Outcome Measures: Patients' symptoms and clinical examination to confirm a normal eyelid position (no entropion or secondary ectropion) at rest and with forced orbicularis contraction with the topical amethocaine (tetracaine) test. This test is described. Results: Fifty-five consecutive patients, aged 57 to 91 years (mean, 77 years) underwent LTS+ES surgery on 62 eyelids. Surgery was performed by a consultant ophthalmic oculoplastic surgeon (attending supervising physician) in 8 eyelids and by 20 different trainees, residents, and fellows in 54 eyelids. Six patients died (11%) within 6 months of surgery and 2 patients (3.5%) were lost to follow-up, resulting in 47 evaluable patients (54 eyelids). The follow-up period was 12 to 34 months (mean, 18 months). Fifty-three of 54 eyelids (98%) had a successful outcome with no recurrence. The surgery was effective when performed by different grades of surgeon (P>0.4). Conclusions: The LTS+ES is a simple operation for the correction of involutional entropion that can be performed effectively by both residents and fellows. © 2006 by the American Academy of Ophthalmology.