Agreement between Corneal Thickness Measurements Using Pentacam Scheimpflug Camera, Noncontact Specular Microscopy, and Ultrasonographic Pachymetry in Diabetic Patients

Altay, Yeşim; Balta, Özgür; Demirok, Gülizar; Burcu, Ayse; Balta, Oyku Bezen; Ornek, Firdevs

doi:10.3109/02713683.2016.1170854

Cited by 11 publications

(20 citation statements)

References 25 publications

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“…Unlike the wide agreement in lens changes of DM patients, it is still controversial whether corneal thickness is affected in DM patients. The discrepancies among different reports could be different devices that are used in CCT measurement, and the HbA1c level may determine the agreement of each pachymetry devices according to Altay et al [14]. The outcomes in our study were similar to Wiemer et al and Uzel et al, the mean CCT, K1, and K2 showed no significant difference between 2 groups.…”

Section: Discussionsupporting

confidence: 68%

Influence of Type 1 Diabetes Mellitus on the Ocular Biometry of Chinese Children

Xiao

Jia

et al. 2019

Journal of Ophthalmology

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Purpose. To compare ocular biometry between children with type 1 diabetes mellitus (T1DM) and healthy children in China and to determine the correlation of ocular biometry with the glycosylated hemoglobin (HbA1c) level and diabetes duration. Methods. A case-control study was conducted at Children’s Hospital of Fudan University between T1DM children and healthy children. The participants were evaluated for central corneal thickness (CCT), anterior chamber depth (ACD), lens thickness (LT), K1 and K2 keratometry, and axial length (AL); also cycloplegic refraction was performed, and spherical equivalent (SE) was acquired. HbA1c levels of the T1DM cases were obtained. Results. Fifty-four eyes of 54 children with T1DM and 53 eyes of 53 healthy children were included. The mean age of T1DM group and control group was 10.59 ± 3.40 years and 9.55 ± 1.89 years, respectively, and the differences between age and gender were not significant (p=0.052, p=0.700). The mean LT in T1DM group (3.49 ± 0.18 mm) was thicker than that in the control group (3.40 ± 0.16 mm) (p=0.018), the mean ACD in T1DM group (3.52 ± 0.26 mm) was shallower than that in the control group (3.72 ± 0.26 mm) (p<0.001), and there were no significant differences of CCT, K1, K2, AL, and SE (p=0.088, p=0.672, p=0.821, p=0.094, and p=0.306, respectively). There was no significant correlation between HbA1c or diabetes duration and ocular biometry. Conclusions. Thicker LT and shallower ACD occurred in T1DM children rather than age-matched and sex-matched healthy children, but the overall refraction was not affected. HbA1c or diabetes duration was not correlated with ocular biometry in T1DM children.

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Section: Discussionsupporting

confidence: 68%

Influence of Type 1 Diabetes Mellitus on the Ocular Biometry of Chinese Children

Xiao

Jia

et al. 2019

Journal of Ophthalmology

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“…Wirbelauer et al [34] found (541 AE 43) μm for the mean central corneal thickness of 108 subjects (age range: 25-87 years). Altay et al [35] reported mean values on 137 subjects (age range: 18-64 years) equal to (522 AE 34), (543 AE 34), and (538 AE 35) μm, measured by Scheimpflug camera, specular microscopy, and ultrasound pachymetry, respectively. Compared to other techniques, the measurement of corneal thickness with the slit-lamp biomicroscope adds no extra costs for the clinicians, who routinely use this instrument.…”

Section: In Vivo Resultsmentioning

confidence: 99%

Corneal Pachymetry and Endothelial Microscopy by Slit-Lamp

Tavazzi¹,

Parodi²,

Colciago³

et al. 2019

Novel Diagnostic Methods in Ophthalmology

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A slit-lamp biomicroscope Visionix VX75 has been equipped with a highresolution digital sensor. A specular reflection technique at an angular magnification of 36Â performed by the slit-lamp biomicroscope is used to develop a procedure to (i) measure the thickness of the human cornea by measuring the distance between the two reflections of its anterior and posterior surfaces and (ii) capture suitable images for morphometric analyses of the corneal endothelium's cell mosaic. The examples of morphometric analysis of these images are reported. The biases due to the dioptric power of the anterior surface of the cornea, the oblique observation, and the asymmetry of the digital biomicroscope are discussed. These biases can be corrected by a specific calibration.

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“…The aim of this study was to determine the impact of DM on CCT and its correlation with diabetes duration and glycated haemoglobin (HbA1c) levels. Several studies show a significant increase in CCT values in DM patients, 3,14,15,16,17,18,19,20,21,22,23,24,25,26,27,28,29,30 although the mechanism responsible for these changes in corneal structure and function remains to be fully understood. Some studies have found a correlation between DM duration and the increase of CCT values, 17,20,25 and others have observed an increase in CCT values when glycated haemoglobin (HbA1c) levels are elevated.…”

Section: Aimmentioning

confidence: 99%

Effect of diabetes mellitus on quantitative corneal anatomy – A systemic review

Sanchis‐Gimeno

Hasrod

Calvo-Maroto

et al. 2022

Afr. vis. eye health

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Background: Corneal changes occur as a direct consequence of diabetes mellitus (DM). The central corneal thickness (CCT) is a useful parameter that provides information about the status of the metabolism of the cornea and can therefore help monitor the progression of DM.Aim: The aim of this study was to determine the impact of DM on CCT and its correlation with diabetes duration and glycated haemoglobin (HbA1c) levels.Methods: The systematic review was undertaken to answer: (1) What effect does DM have on CCT values? (2) What effect does DM duration have on CCT values? (3) What effect does HbA1c levels have on CCT values? The Web of Science was used to conduct a computerised search for articles of CCT values in DM.Results: A total of 38 articles that met the criteria for inclusion were included in this systemic review. The researchers found 27 articles that observed increased CCT values in DM patients compared with control subjects. There were six studies in which increased CCT values were related to DM duration and 12 studies in which DM duration did not alter CCT values. Also, eight studies showed that CCT values increased with glycated haemoglobin levels, and 12 studies did not observe this.Conclusion: Diabetes mellitus patients usually present with increased CCT values although there is no unanimity about the effect of DM duration and increased HbA1c levels (poor glycaemic control) in the CCT values of DM patients.

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Agreement between Corneal Thickness Measurements Using Pentacam Scheimpflug Camera, Noncontact Specular Microscopy, and Ultrasonographic Pachymetry in Diabetic Patients

Cited by 11 publications

References 25 publications

Influence of Type 1 Diabetes Mellitus on the Ocular Biometry of Chinese Children

Influence of Type 1 Diabetes Mellitus on the Ocular Biometry of Chinese Children

Corneal Pachymetry and Endothelial Microscopy by Slit-Lamp

Effect of diabetes mellitus on quantitative corneal anatomy – A systemic review

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