Management of Post-Penetrating Keratoplasty Astigmatism by Photorefractive Keratectomy

Document Type : Original Article

Author

Lecturer of Ophthalmology, Faculty of Medicine, AL-Azhar University (Assuit), Egypt

Abstract

Background: Astigmatism after keratoplasty continues to be a difficult case for corneal refractive surgeons. Astigmatism is a barrier to visual recovery after a successful corneal transplant, even though graft viability is the primary concern in keratoplasty.
Aim and objectives:The aim of the study was to assess the management of postoperative   penetrating keratoplasty astigmatism by photorefractive keratectomy.
Subject and methods: Study was done between March 2021 and March 2022 at Al-Nahar eye center (Assiut).  30 eyes of 30 patient underwent PTK-PRK (phototherapeutic keratectomy and photorefractive keratectomy), all were done by the same surgeon.      
Results: The BCVA (Best Corrected Visual Acuity) of the studied eyes ranged from 0.01 to 0.2 with a median value of  0.1 and IQR between (0.1 and 0.2) preoperatively, which was significantly improved after 1 month to have a median value of 0.5 and IQR between (0.4 and 0.58, P=0.003) and kept improving significantly after 2 and 3 months by comparison to preoperative to have a median of 0.7 with IQR (0.7: 0.8) after 2 months and all eyes had a BCVA of 0.8 after 3 months (P<0.001).
Conclusion: Clear graft penetrating keratoplasty (PK) improves eyesight. Significant postoperative astigmatism, however, may impair visual acuity to some degree. After keratoconus, patients with astigmatism have more than one treatment option available.
 

Keywords

The Egyptian Journal of Hospital Medicine
Volume 91, Issue 1
April 2023
Pages 4204-4209

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