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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| Format: | Article |
| Language: | English English |
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International Islamic University Malaysia
2016
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| Online Access: | http://irep.iium.edu.my/51070/ http://irep.iium.edu.my/51070/4/51070_New%20modified%20equation%20of%20contact%20lens%20method.pdf http://irep.iium.edu.my/51070/5/51070_%20New%20modified%20equation%20of%20contact%20lens%20method%20SCOPUS.pdf |
| _version_ | 1848783776119783424 |
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| 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 |
| building | IIUM Repository |
| collection | Online Access |
| 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. |
| first_indexed | 2025-11-14T16:26:43Z |
| format | Article |
| id | iium-51070 |
| institution | International Islamic University Malaysia |
| institution_category | Local University |
| language | English English |
| last_indexed | 2025-11-14T16:26:43Z |
| publishDate | 2016 |
| publisher | International Islamic University Malaysia |
| recordtype | eprints |
| repository_type | Digital Repository |
| spelling | iium-510702023-08-25T09:10:22Z 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. International Islamic University Malaysia 2016-06-01 Article PeerReviewed application/pdf en http://irep.iium.edu.my/51070/4/51070_New%20modified%20equation%20of%20contact%20lens%20method.pdf application/pdf en http://irep.iium.edu.my/51070/5/51070_%20New%20modified%20equation%20of%20contact%20lens%20method%20SCOPUS.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 https://journals.iium.edu.my/kom/index.php/imjm/article/view/408/216 10.31436/imjm.v15i1.408 |
| 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 |
| title | 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_short | 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 |
| topic | RE Ophthalmology |
| url | http://irep.iium.edu.my/51070/ http://irep.iium.edu.my/51070/ http://irep.iium.edu.my/51070/ http://irep.iium.edu.my/51070/4/51070_New%20modified%20equation%20of%20contact%20lens%20method.pdf http://irep.iium.edu.my/51070/5/51070_%20New%20modified%20equation%20of%20contact%20lens%20method%20SCOPUS.pdf |