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Correlation of visual recovery time after laser refractive surgery with preoperative keratometry and astigmatism among myopic astigmatism patients

Akhtar Ali, Ahmad Nurfahmi and Md Mustafa, Md Muziman Syah and Rahim, Fadzilah Hanim and Ahmad Fauzi, Nadhirah and Mohd. Kamal, Khairidzan and Hilmi, Mohd Radzi (2020) Correlation of visual recovery time after laser refractive surgery with preoperative keratometry and astigmatism among myopic astigmatism patients. International Journal of Allied Health Sciences, 4 (1). pp. 1028-1041. E-ISSN 2600-8491

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Abstract

Introduction: Photorefractive keratometry (PRK) and laser in situ keratomileusis (LASIK) are among the many types of laser refractive surgery available for the correction of myopic astigmatism. The outcome of the procedure can be affected by several parameters which include patient’s age, optical zone diameter, epithelial hyperplasia, preoperative keratometry as well as astigmatism. Aim: This study aimed to determine the relationship between preoperative keratometry and astigmatism with visual recovery time after laser refractive surgery. Methods: Records of 174 eyes (174 patients) with myopic astigmatism who had been treated with either LASIK (71 eyes) or PRK (103 eyes) at IIUM Eye Specialist Clinic from January 2015 to June 2018, were retrospectively analyzed. Main outcome measure was the time taken for patients to achieve visual acuity (VA) 6/6 (equivalent to 0.00 LogMAR) postoperatively. Value for keratometry parameter was taken from corneal topography while astigmatism magnitude was taken from manifest refraction. Their correlation with visual recovery time was analyzed using Pearson correlation coefficient (PCC). P <0.05 was considered as statistically significant. Results: The mean preoperative astigmatism and mean keratometry was 0.9 ±0.76D and 43.65 ±1.23D respectively. A significant but weak positive correlation between preoperative astigmatism and visual recovery time was observed (P-value = 0.013; R = 0.188), while no correlation observed for mean keratometry (P-value = 0.305; R = 0.078). Conclusions: Preoperative astigmatism influenced the visual recovery time post laser refractive surgery in myopic astigmatism patients, but not keratometry.

Item Type: Article (Journal)
Additional Information: 6412/79020
Uncontrolled Keywords: myopic astigmatism, laser refractive surgery, manifest astigmatism, mean keratometry, visual recovery time
Subjects: R Medicine > RE Ophthalmology
Kulliyyahs/Centres/Divisions/Institutes (Can select more than one option. Press CONTROL button): Kulliyyah of Allied Health Sciences > Department of Optometry and Visual Science
Kulliyyah of Medicine > Department of Ophthalmology
Depositing User: Dr. Md Muziman Syah Md Mustafa
Date Deposited: 23 Feb 2020 01:11
Last Modified: 19 Nov 2020 16:26
URI: http://irep.iium.edu.my/id/eprint/79020

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