New modified equation of contact lens method in determining post myopic laser refractive surgery corneal power

New modified equation of contact lens method in determining post myopic laser refractive surgery corneal power

Introduction: The purpose of this study was to derive a modified equation for contact lens method (CLM) in calculating post myopic laser refractive surgery corneal power. Methods: A total of 93 subjects who underwent myopic laser refractive surgery at IIUM Eye Specialist Clinic were recruited. The...

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Main Authors: Md Mustafa, Md Muziman Syah, Abdul Mutalib, Haliza, Malkeet Singh, Sharanjeet Kaur, Mohd. Kamal, Khairidzan
Format: Article
Language:English
Published: Faculty of Medicine, International Islamic University Malaysia 2016
Subjects:
RE Ophthalmology
Online Access:http://irep.iium.edu.my/51070/
http://irep.iium.edu.my/51070/
http://irep.iium.edu.my/51070/1/Vol15No1JUNE-2016-061-068.pdf
id iium-51070
recordtype eprints
spelling iium-510702016-07-27T08:22:54Z http://irep.iium.edu.my/51070/ New modified equation of contact lens method in determining post myopic laser refractive surgery corneal power Md Mustafa, Md Muziman Syah Abdul Mutalib, Haliza Malkeet Singh, Sharanjeet Kaur Mohd. Kamal, Khairidzan RE Ophthalmology Introduction: The purpose of this study was to derive a modified equation for contact lens method (CLM) in calculating post myopic laser refractive surgery corneal power. Methods: A total of 93 subjects who underwent myopic laser refractive surgery at IIUM Eye Specialist Clinic were recruited. The accuracy of postoperative corneal power using the standard CLM and newly-derived contact lens modified method (CLMmod) were compared to the standard comparison method ; the historical method (HM). The CLMmod equation was derived by adjusting postoperative corneal power of CLM according to amount of refractive change. Results: The mean postoperative corneal power using standard CLM was significantly higher than HM (mean difference: -0.24 D, p < 0.001). Fifty seven percent (n = 53 eyes) of the standard CLM results were within ±0.50 D of HM results. The difference between postoperative corneal power using standard CLM and HM increased significantly with the amount of refractive change (r = 0.835; p < 0.001). The mean postoperative corneal power of CLMmod showed that there was no statistical significant difference compared to the HM results (mean difference: 0.00 D, p= 0.964). Eighty eight percent (n = 82 eyes) of the CLMmod results were within ±0.50 D of HM results with improvement of 31% from the standard CLM results. Conclusion: The CLMmod equation provides more accurate calculation in determining post myopic laser refractive surgery corneal power. In near future, this modified equation can be used as an alternative equation to calculate postoperative corneal power when the preoperative data is unavailable. Faculty of Medicine, International Islamic University Malaysia 2016-06 Article PeerReviewed application/pdf en http://irep.iium.edu.my/51070/1/Vol15No1JUNE-2016-061-068.pdf Md Mustafa, Md Muziman Syah and Abdul Mutalib, Haliza and Malkeet Singh, Sharanjeet Kaur and Mohd. Kamal, Khairidzan (2016) New modified equation of contact lens method in determining post myopic laser refractive surgery corneal power. International Medical Journal Malaysia, 15 (1). pp. 61-68. ISSN 1823-4631 http://iiumedic.net/imjm/v1/download/Volume%2015%20No%201/original_article/Vol15No1JUNE-2016-061-068.pdf
repository_type Digital Repository
institution_category Local University
institution International Islamic University Malaysia
building IIUM Repository
collection Online Access
language English
topic RE Ophthalmology
spellingShingle RE Ophthalmology
Md Mustafa, Md Muziman Syah
Abdul Mutalib, Haliza
Malkeet Singh, Sharanjeet Kaur
Mohd. Kamal, Khairidzan
New modified equation of contact lens method in determining post myopic laser refractive surgery corneal power
description Introduction: The purpose of this study was to derive a modified equation for contact lens method (CLM) in calculating post myopic laser refractive surgery corneal power. Methods: A total of 93 subjects who underwent myopic laser refractive surgery at IIUM Eye Specialist Clinic were recruited. The accuracy of postoperative corneal power using the standard CLM and newly-derived contact lens modified method (CLMmod) were compared to the standard comparison method ; the historical method (HM). The CLMmod equation was derived by adjusting postoperative corneal power of CLM according to amount of refractive change. Results: The mean postoperative corneal power using standard CLM was significantly higher than HM (mean difference: -0.24 D, p < 0.001). Fifty seven percent (n = 53 eyes) of the standard CLM results were within ±0.50 D of HM results. The difference between postoperative corneal power using standard CLM and HM increased significantly with the amount of refractive change (r = 0.835; p < 0.001). The mean postoperative corneal power of CLMmod showed that there was no statistical significant difference compared to the HM results (mean difference: 0.00 D, p= 0.964). Eighty eight percent (n = 82 eyes) of the CLMmod results were within ±0.50 D of HM results with improvement of 31% from the standard CLM results. Conclusion: The CLMmod equation provides more accurate calculation in determining post myopic laser refractive surgery corneal power. In near future, this modified equation can be used as an alternative equation to calculate postoperative corneal power when the preoperative data is unavailable.
format Article
author Md Mustafa, Md Muziman Syah
Abdul Mutalib, Haliza
Malkeet Singh, Sharanjeet Kaur
Mohd. Kamal, Khairidzan
author_facet Md Mustafa, Md Muziman Syah
Abdul Mutalib, Haliza
Malkeet Singh, Sharanjeet Kaur
Mohd. Kamal, Khairidzan
author_sort Md Mustafa, Md Muziman Syah
title New modified equation of contact lens method in determining post myopic laser refractive surgery corneal power
title_short New modified equation of contact lens method in determining post myopic laser refractive surgery corneal power
title_full New modified equation of contact lens method in determining post myopic laser refractive surgery corneal power
title_fullStr New modified equation of contact lens method in determining post myopic laser refractive surgery corneal power
title_full_unstemmed New modified equation of contact lens method in determining post myopic laser refractive surgery corneal power
title_sort new modified equation of contact lens method in determining post myopic laser refractive surgery corneal power
publisher Faculty of Medicine, International Islamic University Malaysia
publishDate 2016
url http://irep.iium.edu.my/51070/
http://irep.iium.edu.my/51070/
http://irep.iium.edu.my/51070/1/Vol15No1JUNE-2016-061-068.pdf
first_indexed 2023-09-18T21:12:15Z
last_indexed 2023-09-18T21:12:15Z
_version_ 1777411330207121408

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