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Research Paper | Ophthalmology | India | Volume 11 Issue 12, December 2022 | Rating: 5.1 / 10
Changes in Corneal Astigmatism Following Pterygium Removal
Dr. Sadiya Aijaz [3] | Dr. Sidra Javaid [3] | Dr. Younis Ahmad Dar [3] | Dr. Sehrish Deva [3]
Abstract: Aims: To investigate the effect of different types of pterygium excision surgery on post operative corneal stigmatism. Setting and Design:-Prospective comparative analysis. Materials and Methods: 240 eyes were considered for pterygium excision. Following pterygiumexcision, these patients underwent 5 different types of surgeries: Conjunctival autograft with sutures (CAG-s) or fibrin glue (CAG-g), conjunctival rotational flap (CRF), or amniotic membrane transplantation with either suture (AMT-s) or with glue (AMT-g). The preoperative and postoperative keratometric measurements were taken using an automated kerato refractometer. Statistical Analysis: The changes in Best Corrected Visual Acuity and astigmatic degree were evaluated using Wilcoxon signed rank test. The difference in a stigmatic values between groups was calculated using one way analysis of variance (ANOVA). Results: The most commonly performed procedure was CAG-s (N = 115), followed by CAG-g (N = 53), CRF (N = 47), AMT-s (N = 15), and AMT-g (N=10). Following surgery, astigmatic values decreased from 3.47 ? 2.50 D to 1.29 ? 1.07 D (P < 0.001, paired t test). The change in astigmatism was significantly related to the preoperative size of the pterygium (? = 3.464, P = 0.005). The postoperative astigmatism correlated with preoperative astigmatism (? = 0.351, P < 0.001, Spearman correlation analysis). The changes in astigmatic values were not related to the method of surgery (P=0.055, ANOVA). Conclusion: High corneal astigmatism occurs due to pterygium, which decreases following excision. According to our study, the type of grafting or the use of suture or glue to fixate the graft does not have a significant effect on the change in astigmatism degree.
Keywords: pterygium excision, postoperative corneal astigmatism, Conjunctival autograft with sutures, fibrin glue, conjunctival rotational flap, amniotic membrane transplantation with either suture or glue
Edition: Volume 11 Issue 12, December 2022,
Pages: 658 - 662