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Correlation between Refractive Errors, Axial Length, Corneal Curvatures and AL/CR ratio among first year undergraduate student in UiTM Puncak Alam, Selangor / Amalina Mohd Halil

Purpose: This study was designed to study the correlation between refractive error, axial length, corneal curvature, AL/CR ratio and lens power among first year undergraduate students in UiTM Puncak Alam, Selangor. Methods: In this cross sectional study, 203 of first year undergraduate students in U...

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Main Author: Mohd Halil, Amalina
Format: Thesis
Language:English
Published: 2016
Subjects:
Higher Education
Graduate students
Refraction and errors of refraction and accommodation
Optometry. Opticians. Eyeglasses
Online Access:https://ir.uitm.edu.my/id/eprint/22294/7/22294.pdf
https://ir.uitm.edu.my/id/eprint/22294/
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spelling my.uitm.ir.222942024-10-28T01:52:21Z https://ir.uitm.edu.my/id/eprint/22294/ Correlation between Refractive Errors, Axial Length, Corneal Curvatures and AL/CR ratio among first year undergraduate student in UiTM Puncak Alam, Selangor / Amalina Mohd Halil Mohd Halil, Amalina Higher Education Graduate students Refraction and errors of refraction and accommodation Optometry. Opticians. Eyeglasses Purpose: This study was designed to study the correlation between refractive error, axial length, corneal curvature, AL/CR ratio and lens power among first year undergraduate students in UiTM Puncak Alam, Selangor. Methods: In this cross sectional study, 203 of first year undergraduate students in UiTM Puncak Alam, Selangor of mean age 20.78±0.93 years old volunteed themselves to participate as subjects. They underwent 3 procedures which were subjective refraction without cycloplegia by using Logmar chart, corneal radius (CR) of curvature by using NIDEK Corneal Topography and axial length (AL) by using TOMEY Biometer AL-100. The subjects were characterized according to these 3 variables to establish correlation between them. After determining the value of CR and AL, the ratio were calculated by dividing axial length with corneal radius to use in the analysis. Individuals with a history of ocular trauma, ocular surgery and take medication for systemic or ocular disease were excluded. Result: Out of 400 targeted subjects, 200 were included in the analysis. 71.5% of the subject were myopia (<-0.50D), 22.5% were emmetropia (>-0.50D - < +0.50 D) and 6% were hyperopia (<+0.50D). The correlation coefficient between spherical equivalent SE and CR, and AL/CR ratio were 0.187, and 0.829, respectively. The correlation between AL and CR was 0.253. The correlation between lens power and AL/CR ratio was 0.185. The r2 value of 0.687 suggests that 68.7% of the variance in refractive error can be accounted for the variation in AL/CR ratio. Mean AL/CR ratio was 3.12±0.18. Conclusion: The correlation between SE and AL/CR ratio was significantly stronger as compared to with AL and CR alone. 2016 Thesis NonPeerReviewed text en https://ir.uitm.edu.my/id/eprint/22294/7/22294.pdf Correlation between Refractive Errors, Axial Length, Corneal Curvatures and AL/CR ratio among first year undergraduate student in UiTM Puncak Alam, Selangor / Amalina Mohd Halil. (2016) Degree thesis, thesis, Universiti Teknologi MARA, Selangor, Puncak Alam Campus. <http://terminalib.uitm.edu.my/22294.pdf>
institution Universiti Teknologi Mara
building Tun Abdul Razak Library
collection Institutional Repository
continent Asia
country Malaysia
content_provider Universiti Teknologi Mara
content_source UiTM Institutional Repository
url_provider http://ir.uitm.edu.my/
language English
topic Higher Education
Graduate students
Refraction and errors of refraction and accommodation
Optometry. Opticians. Eyeglasses
spellingShingle Higher Education
Graduate students
Refraction and errors of refraction and accommodation
Optometry. Opticians. Eyeglasses
Mohd Halil, Amalina
Correlation between Refractive Errors, Axial Length, Corneal Curvatures and AL/CR ratio among first year undergraduate student in UiTM Puncak Alam, Selangor / Amalina Mohd Halil
description Purpose: This study was designed to study the correlation between refractive error, axial length, corneal curvature, AL/CR ratio and lens power among first year undergraduate students in UiTM Puncak Alam, Selangor. Methods: In this cross sectional study, 203 of first year undergraduate students in UiTM Puncak Alam, Selangor of mean age 20.78±0.93 years old volunteed themselves to participate as subjects. They underwent 3 procedures which were subjective refraction without cycloplegia by using Logmar chart, corneal radius (CR) of curvature by using NIDEK Corneal Topography and axial length (AL) by using TOMEY Biometer AL-100. The subjects were characterized according to these 3 variables to establish correlation between them. After determining the value of CR and AL, the ratio were calculated by dividing axial length with corneal radius to use in the analysis. Individuals with a history of ocular trauma, ocular surgery and take medication for systemic or ocular disease were excluded. Result: Out of 400 targeted subjects, 200 were included in the analysis. 71.5% of the subject were myopia (<-0.50D), 22.5% were emmetropia (>-0.50D - < +0.50 D) and 6% were hyperopia (<+0.50D). The correlation coefficient between spherical equivalent SE and CR, and AL/CR ratio were 0.187, and 0.829, respectively. The correlation between AL and CR was 0.253. The correlation between lens power and AL/CR ratio was 0.185. The r2 value of 0.687 suggests that 68.7% of the variance in refractive error can be accounted for the variation in AL/CR ratio. Mean AL/CR ratio was 3.12±0.18. Conclusion: The correlation between SE and AL/CR ratio was significantly stronger as compared to with AL and CR alone.
format Thesis
author Mohd Halil, Amalina
author_facet Mohd Halil, Amalina
author_sort Mohd Halil, Amalina
title Correlation between Refractive Errors, Axial Length, Corneal Curvatures and AL/CR ratio among first year undergraduate student in UiTM Puncak Alam, Selangor / Amalina Mohd Halil
title_short Correlation between Refractive Errors, Axial Length, Corneal Curvatures and AL/CR ratio among first year undergraduate student in UiTM Puncak Alam, Selangor / Amalina Mohd Halil
title_full Correlation between Refractive Errors, Axial Length, Corneal Curvatures and AL/CR ratio among first year undergraduate student in UiTM Puncak Alam, Selangor / Amalina Mohd Halil
title_fullStr Correlation between Refractive Errors, Axial Length, Corneal Curvatures and AL/CR ratio among first year undergraduate student in UiTM Puncak Alam, Selangor / Amalina Mohd Halil
title_full_unstemmed Correlation between Refractive Errors, Axial Length, Corneal Curvatures and AL/CR ratio among first year undergraduate student in UiTM Puncak Alam, Selangor / Amalina Mohd Halil
title_sort correlation between refractive errors, axial length, corneal curvatures and al/cr ratio among first year undergraduate student in uitm puncak alam, selangor / amalina mohd halil
publishDate 2016
url https://ir.uitm.edu.my/id/eprint/22294/7/22294.pdf
https://ir.uitm.edu.my/id/eprint/22294/
_version_ 1814939848680669184
score 13.211869

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