Background: Modifications in eyelid position change pressure exerted on the corneal anterior surface and produce topographic changes that may affect the quality of vision and corneal refractive power and related measurements. Aim of work: The aim of the current study is to evaluate corneal topographic changes after ptosis surgery. Patient and Methods: 30 eyes of 30 patients of ptosis underwent surgical correction. Complete ophthalmic examination and computerized topography were performed before surgery, then 1-month and 3-months after surgery. The pre-operative and post-operative data were subtracted and statistically analyzed. Data included K1, K2, average keratometry (avgK), corneal astigmatism (value & type), apical keratometry front (AKf) and symmetry index front (SIf). The effect of surgery on BCVA was also evaluated. Results: 1-month postoperative, none of the measured parameters did show any significant change. 3-months postoperative, corneal astigmatism demonstrated a significant reduction from baseline 1.2 ± 0.3 D to 0.7 ± 0.3 D (p = 0.007). (avgK) also demonstrated a significant reduction from baseline 43.1 ± 1.3 D to 42.2 ± 1.5 D (p = 0.011). Another significant difference was also reported in (AKf) which decreased from baseline 46.21 ± 1.81 to 44.22 ± 2.04 (p = 0.033). (SIf) decreased from baseline-1.23 ± 1.61 to-1.05 ± 1.39, difference was insignificant (p = 0.308). The BCVA improved from baseline 0.54 ± 0.22 to 0.61 ± 0.18 (p = 0.285), improvement was statistically insignificant. Conclusion: The surgical correction of eyelid urges the modification of the anterior corneal surface, restoration of symmetry of the cornea and regular corneal astigmatism.
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