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The relation between central corneal thickness, axial length and myopia among a sample of patients in Erbil
العلاقة بين سمك القرنية المركزي و الطول المحوري وقصر النظر بين عينة من المرضى في أربيل

Authors: Ahmed Kareem Joma --- Kurdo Mohammedamin Omer
Journal: Zanco Journal of Medical Sciences مجلة زانكو للعلوم الطبية ISSN: 19955588/19955596 Year: 2018 Volume: 22 Issue: 1 Pages: 49-55
Publisher: Hawler Medical Univeristy جامعة هولير الطبية

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Abstract

Background and objective: Myopiais a common refractive error in the estimation of corneal barrier and well-beingof endothelial function, the central corneal thickness is important to manage corneal diseases. This study aimed to explore the relationship between central corneal thickness, axial length and myopia among a sample of patients in Erbil.Methods: This cross-sectional study was conducted from June 2015 to February 2016. Forty six emmetropes as a control group and 46 myopes were studied. Axial length was measured with A-scan ultrasound biometry and central corneal thickness with corneal topography. Central corneal thickness was correlated with myopia and axial length using the Pearson’s correlation coefficient.Results: This study included 92 patients. The mean age of myopes was 31.87 years and 33 years for emmetropes. Myopia ranged from –0.5 to –11 diopters. The mean central corneal thickness was 541.80 micrometers for myopes and 548.93 micrometersfor emmetropes. The mean axial length was 25.77 millimetersfor myopes and 24.37 millimetersfor emmetropes.The Pearson’s correlation coefficient (r) of the central corneal thickness and myopia was -0.0245 (P =0.872), while that of the central corneal thickness and axial length in myopes was 0.035 (P = 0.566) and of the central corneal thickness and axial length in emmetropes was 0.26 (P = 0.091).Conclusion: There was no correlation between central corneal thickness, axial length and myopia.


Article
The relation between central corneal thickness and axial length in a sample of Erbil population
العلاقة بين سمك القرنية المركزي والطول المحوري في عينة من سكان أربيل

Authors: Ahmed Ismail Abdulgani --- Ahmed Kareem Joma --- Ari Hassib Muhammad
Journal: Zanco Journal of Medical Sciences مجلة زانكو للعلوم الطبية ISSN: 19955588/19955596 Year: 2015 Volume: 19 Issue: 3 Pages: 1096-1103
Publisher: Hawler Medical Univeristy جامعة هولير الطبية

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Abstract

Background and objective: A thin central corneal thickness has been reported to be a risk factor for developing primary open-angle glaucoma. This has led to a hypothesis that thinning of the cornea may be an indication of generalized weakness of the ocular integument. This study was conducted to explore the relationship between central corneal thickness and axial length in a sample of Erbil population. Methods: This is an observational cross sectional prospective study that was conducted from October 2012 to March 2013 and included 260 eyes of 130 patients. The mean age (± SD) was 37.8 ± 17.7 years for males and 35.4 ± 15.5 years for females. Axial length was measured with A-scan ultrasound biometry and central corneal thickness with ultrasonic Pachymeter.Results: The mean central corneal thickness (± SD) was 542.8 ± 36 µm in male eyes and 530.1 ± 32.5 µm in female eyes. The mean axial length (± SD) was 23.38 ± 1.1 mm in male eyes, 23.15 ± 1.2 mm in female eyes. Central corneal thickness was not correlated with axial length (Pearson correlation coefficient r = 0.037, P = 0.558).Conclusion: Central corneal thickness and axial length of the eye are two independent measurements. Thin corneas are not related to longer eye.


Article
Variation in macular thickness in healthy eyes with or without myopia using optical coherent tomography
تباين في سمك البقعة الصفراء في عيون صحية مع أو بدون قصر النظر باستخدام التصوير المقطعي البصري

Authors: Ahmad Ismail --- Ahmad Kareem --- Eman H. Alwan --- Sami Jalal Abdulsamad
Journal: Zanco Journal of Medical Sciences مجلة زانكو للعلوم الطبية ISSN: 19955588/19955596 Year: 2014 Volume: 18 Issue: 2 Pages: 746-750
Publisher: Hawler Medical Univeristy جامعة هولير الطبية

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Abstract

Background and objective: Difference in macular thickness is affected by age, gender and axial length in any ethnic group. The aim of this study is to report normal macular thickness measurement in healthy Iraqi eyes using Optical Coherence Tomography mapping software. Methods: In this cross–sectional study, the macula of 150 eyes (75 healthy subjects) underwent a complete ophthalmic examination including Optical Coherence Tomography. Optical Coherence Tomography parameters of macular thickness were analyzed with baseline variables including age, gender and axial length. Results: Mean central foveal thickness were 217µm and mean macular thickness in 6mm diameter were 245µm. Macular thickness measurement were thinnest at the center of the fovea, thickest within 3mm diameter of the center, and diminish toward the periphery of the macula. The temporal quadrant was thinner than the nasal quadrant. No correlation was found between macular thickness and age. The difference between male and female was significant (P < 0.05). The macula thickness was significantly less in eyes with axial length more than 24mm and more in eyes with axial length less or equal to 24mm (P < 0.05). Conclusion: The macular thickness has a significant correlation with gender and axial length. This normal baseline data of macular thickness of the eyes of Iraqis living in Erbil may be a useful guideline for further research and management of glaucoma and macular diseases.

Keywords

Macula --- OCT --- Age --- Gender --- Axial length

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