Materials and Methods: 60 eyes of 60 patients with involutional entropion (30 eyes) and involutional ectropion (30 eyes) correction procedures with lateral tarsal strip included in this prospective study. Detailed ophthalmologic examination was performed including best corrected visual acuity (BCVA), slit lamp examination and dilated fundoscopy. Measurements were made before and one month after the surgeries using Pentacam. Central corneal thickness (CCT) and pachymetry of thinnest location, cornea front astigmatism (AST), flat keratometry (K1), steep keratometry (K2) and mean keratometry (Km) values were all evaluated.

Results: Ectropion patients exhibited higher postoperative Km (p=0.019). Additionally, postoperative AST values were significantly lower in both ectropion and entropion groups (p=0.001, p=0.001, respectively). Increased pachymetry values of pupil center and the thinnest location were found in entropion cases (p=0.002, p=0.023, respectively).

Conclusion: Surgical repositioning of the lower eyelids for malposition correction may result with statistically significant decrease in corneal astigmatism postoperatively also some fundamental changes in corneal topography. Awareness of these changes after eyelid surgery is very important in-patient management. Keywords : astigmatism, corneal topography, ectropion, entropion, lateral tarsal strip, Pentacam