Corneal Topographic Changes after Correction of Ptosis by Levator Muscle Resection Measured by Scheimpflug Imaging

Abstract

Background: Blepharoptosis is a drooping of the upper eyelid. The effect of ptosis surgery on corneal topography is debatable and needs to be identified. Aim of Study:To evaluate the corneal topographic changes after levator resection surgery in patients affected by congenital or acquired ptosis.Patients and Methods: This is a prospective study included 20 eyes with moderate to severe ptosis and a levator function range of 6-10mm and with the probability to be subjected to clinical examination and topographic investigations. Patients underwent between 14 to 20mm of transcutaneous levator muscle resection. The patients underwent complete ophthalmological examination, routine lid examination for ptosis and corneal topography. Topographic parameters included K1, K2, astigmatic axis and power and pachy apex.Results: After surgical ptosis repair, corneal topography demonstrated a reduction in K1 of 0.12 ±0.28 diopters (D) which was non statistically significant, also k2 showed a reduction of -0.12±0.28 diopters (D) and that difference is not considered statistically significant. Regarding corneal astigmatism it increased by 0.02 ±0.29 diopters (D) and by measuring the p-value of that change it is not considered statistically significant. Both corneal astigmatism axis and pachy apex didn't show statistically significant change. Conclusion:Correction of ptosis by levator muscle resection increased corneal astigmatism six weeks after surgery with non-significant degree.