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Article
Correlation between Refractive Error and Corneal Thickness in a sample of Iraqi Population with a Wide Range of Ametropia

Authors: Muthanna Abdulkhudhur Abbas --- Hussein Ali Alhammami
Journal: Karbala Journal of Medicine مجلة كربلاء الطبية ISSN: 19905483 Year: 2018 Volume: 11 Issue: 2 Pages: 4032-4038
Publisher: Kerbala University جامعة كربلاء

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Abstract

background: The assessment of corneal thickness has gained importance in different fields of ophthalmology in recent years, and measurement of the central corneal thickness (CCT) has become an important part of a routine examination in refractive surgery.Aim: To determine the Correlation between Refractive Error and Central Corneal Thickness in A NAJAF Population with a Wide Range of Ametropia.Method: In a cross sectional observational study, Involved 399 eyes of 200 Patients for whom the cen-tral corneal thickness (CCT) was measured with Ultrasonic pachymetry (TOMEY PACHYME-TER SP-3000).The refractive error, including sphere, cylinder, and spherical equivalent (SE), were measured with Topcon (KR.8900) autorefractometer And Manual refraction.Examination of anterior segment using slit lamp and fundoscopy using volk + 90 D, were done to exclude any underlying pathology Results: The mean age of the study subjects was 30.71(range, 17 to 61) years. The mean spherical equiva-lent (SE) of the right eye was -3,2475 Diopter (range,-11.25 to 5.75 Diop-ters) while SE of the left eye was-3,2035 Diopter (range,-14.5 to 8.5 Diopters). The mean cen-tral corneal thick-ness(CCT) of the right eye 533,1600 Micron (range,407.00 to 635.00 Mi-cron) while CCT of the left eye was 532,7638 Micron (range,394.00 to 630.00 Micron). No significant correlation were found between spherical equivalent (SE) and central corneal thickness (CCT) of right and left eye among the studied group.Conclusion: No significant Relation found between Refractive errors and central corneal thickness (CCT).


Article
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
Precision of pachymetric measurements with Scheimpflug –Placido disc cornealTopography and comparison of these measurements with ultrasonic pachymetry
في قياس سمك القرنية دقة جھاز خريطة القرنية(Sirius Topographt)ومقارنة النتائج مع السمك المقاس بجھاز الامواج فوق الصوتية (Sirius Topographt)

Author: Suzan Amana Rattan, MBChB, FICMS (Oph د.سوزان امانه –كليه طب الكندي
Journal: Al-Kindy College Medical Journal مجلة كلية الطب الكندي ISSN: 18109543 Year: 2015 Volume: 11 Issue: 2 Pages: 64-68
Publisher: Baghdad University جامعة بغداد

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Abstract

Back ground: Several devices with different physical bases have been developed for the clinical measurement of corneal thickness, they classified into 4 categories: Scheimpflug photography based, Slit –Scanning topography, optical coherence tomography (OCT) based and ultrasound (US) based.Objective:To evaluatethe precision of the new Scheimpflug –Placido disc corneal topography in measurement of corneal thickness and to compare the measured values with that obtained by US pachymetry.Methods: Setting of this study is Lasik center in Eye Specialty Private Hospital. Baghdad. Iraq.Eyes of healthy subjects were examined with the Sirius topography.3 consecutive measurements of central (CCT)and thinnest (TCT) corneal thicknesses were obtainedand the measurements repeated within 1 week. The within –subject standard deviation (Sw),test-retest repeatability ,coefficient of variation (CoV),and interclass correlation coefficient (ICC) were calculated to evaluate intra session repeatability and intersession reproducibility. For US pachymetry (Tomey-SP 100) only CCT was measured. Comparison ofthe measurements that obtained by the 2 devices done by paired t-test.Results: The topography provides high intrasession repeatability with test-retest and CoV close to 6μm and0.4%, respectively for both CCT and TCT. The inter session reproducibility also high with test-retest and CoV close to 8μm and 0.5%, respectively.ICC was higher than 0.97 for repeatability and reproducibility . Anarrow 95% limit of agreement was found between the pachymetry obtained by topography and US pachymetry measurements.Conclusions :The topography has been used showed high intrasession repeatability and intersession reproducibility of CCT and TCT measurements in healthy eyes .Absence of statistically significant differences suggest that the topography -TCT and the US pachymetry - CCT can be used interchangeably in subject with normal cornea.Financial Disclosure: No financial or proprietary interest in any material or method mentioned.

ھدف الدراسة :تقييم دقة جھازSirius Topographt)في قياس سمك القرنية ومقارنة النتائج مع السمك المركزي بجھاز الامواج فوق الصوتية.موقع (Sirius Topographt) ھدف الدراسة :تقييم دقة جھازالدراسة : مركز الليزك / مستشفى العيون الاھلي التخصصي / بغداد / العراق. طريقة البحث : تتضمن الدراسة ١٢٠ عين لمرضى اعمارھم تتراوح من٦٠ ) وحدة بؤرية ± استكماتزم لحد ( ٢٠ ) وحدة بؤرية ، غير مجراة لھم ي عملية للعين سابقا وغير مصابين – ٣٥ ) سنة ، لديھم قصر بصر من ( ٥٠ - ٢٠)تم اخذ ثلاث قياسات متتالية للسمك المركزي والسمك الاقل للقرنية ثم اعيد نفس الفحص خلال (Sirius Topographt) بأي مرض في القرنية ، بجھاز ال(Sirius اسبوع. بعد اتمام الفحص بالجھاز الاول تم اخذ معدل قياس السمك المركزي بجھاز الامواج فوق الصوتية.النتائج : اثبتت الدارسة ان لجھاز الدقة عالية في قياس السمك الاقل والسمك المركزي للقرنية وان ھناك توافق عالي بين السمك المقاس بھذا الجھاز مع السمك المركزي المقاس Topographt)مع السمك المركزي المقاس بجھاز (Sirius Topographt) بجھاز الامواج فوق الصوتية.الاستنتاج : ھناك توافق عالي بين السمك الاق المقاس بجھاز الالامواج فوق الصوتي ويمكن استخدام اي منھما بدلا عن الاخر لقياس سمك للقرنية عند توفر الشروط المذكورة سابقا.


Article
2.CORNEAL CHANGES IN A SAMPLE OF PSEUDOEXFOLIATION IRAQI PATIENTS

Authors: Ahmed M. Rasheed --- Diyar J. Kadum
Journal: IRAQI JOURNAL OF MEDICAL SCIENCES المجلة العراقية للعلوم الطبية ISSN: P16816579,E22244719 Year: 2018 Volume: 16 Issue: 3 Pages: 232-238
Publisher: Al-Nahrain University جامعة النهرين

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Abstract

Background: Pseudoexfoliation syndrome is a common eye disorder that can affect different parts of the eye causing significant morbidity.Objective: To compare corneal endothelial changes between patients with pseudoexfoliation syndrome and normal age matched patients.Methods: Specular microscopy was used to measure central corneal thickness, average size of endothelial cells and coefficient of variation in cell area, endothelial cell density, as well as hexagonality of 238 eyes from 238 patients (120 eyes from patients with pseudo exfoliation syndrome and 118 eyes from normal age-matched patients).Results: Patients with pseudoexfoliation syndrome had lower central corneal thickness (p value 0.049) compared to the control (491.6±28.86 vs 502.5±35.77 µm), lower endothelial cell density (p value 0.02) compared to control (2458.9±430.8 vs 2585.3±378.8 cell/mm2), lower hexagonality (P value 0.006) compared to control (48.25±18.76 vs 55.06±12,44), also a significantly higher coefficient of variation (p value 0.046) compared to control (36.15±7.381 vs 33.4±6.22).Conclusion: Pseudoexfoliation syndrome is associated with a significant change in the corneal endothelium, including reduction of endothelial cell density, increased variation of cells shape (pleomorphism) and increased variation of cells area (polymegathism). There was a significant change of central corneal thickness.Keywords: Corneal endothelium, specular microscopy, pseudoexfoliation syndrome, central corneal thicknessCitation: Rasheed AM, Kadum DJ. Corneal changes in a sample of pseudoexfoliation Iraqi patients. Iraqi JMS. 2018; 16(3): 232-238. doi: 10.22578/IJMS.16.3.2


Article
Corneal Specular Microscopy Changes in Type II Diabetes Mellitus

Authors: Yousif Farhan Dawood --- Najah Kadhum mohammad Al-Quraishi
Journal: Iraqi Academic Scientific Journal المجلة العراقية للاختصاصات الطبية ISSN: 16088360 Year: 2014 Volume: 13 Issue: 4 Pages: 591-598
Publisher: The Iraqi Borad for Medical Specialization المجلس العراقي للاختصاصات الطبية

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Abstract

ABSTRACT:BACKGROUND: Corneal endothelial cells count and shape are vital in keeping corneal transparency with normal vision. Diabetes mellitus is associated with significant changes in the corneal endothelium. OBJECTIVE: To compare corneal endothelial structure and central corneal thickness (CCT) between type II diabetics and non-diabetic control patients.METHODS: Specular microscopy was used to measure central corneal thickness (CCT), average size of endothelial cells, standard deviation of cell size and coefficient of variation in cell area (CV), endothelial cell density, as well as hexagonality of 260 eyes from 260 patients ( 130 eyes from type II diabetic patients and 130 eyes from non diabetic controls).RESULTS: The diabetic corneas have a significant increase in average size of endothelial cells (410.4 ± 89.6 µm² vs. 382.3 ± 83.4 µm²)(p <0.05 ), standard deviation of cell size (152.2 ± 38.0 µm² vs. 128.7 ± 19.5 µm²)(p <0.05) and coefficient of variation (CV) (38.3 % ± 5.4 % vs. 33.4 % ± 4.4%)(p<0.05). and a significant decrease of endothelial cell density (2570.7 ± 563.1 cells / mm² vs. 2704.1 ± 572.5 cells / mm²)(p <0.05) and hexagonality (48.3 ± 17.1% vs. 56.5% ±15.6%)(p<0.05). There was no significant difference in central corneal thickness(CCT) (516.3 ± 63.4 µm vs. 512.8 ± 61.7µm )(p >0.05). CONCLUSION: Type II diabetes associated with a significant changes in the corneal endothelium including, reduction of endothelial cell density, increased variation of cells shape (pleomorphism) and increased variation of cells area (polymegathism). There was no significant changes of central corneal thickness (CCT).

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