Copenhagen 2016 Registration Programme Exhibitor Information Virtual Exhibition Satellite Meetings Glaucoma Day 2016 Hotel Star Alliance

10 - 14 Sept. 2016, Bella Center, Copenhagen, Denmark

This Meeting has been awarded 27 CME credits


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Agreement between corneal thickness measurements using Pentacam Scheimpflug camera, non-contact specular microscopy and ultrasonographic pachymetry in diabetic patients

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Session Details

Session Title: Presented Poster Session: Anterior Segment Imaging

Session Date/Time: Monday 12/09/2016 | 09:30-11:00

Paper Time: 10:40

Venue: Poster Village: Pod 4

First Author: : O.Balta TURKEY

Co Author(s): :    O. Balta   Y. Altay   G. Demirok   A. Burcu   O. Balta   F. Ornek

Abstract Details


To evaluate the agreement of corneal thickness (CT) measurementi;:s obtained by the Pentacam Scheimpflug camera, non-contact specular microscopy (SM) and ultrasonographic pachymetry (UP) in diabetic(DM) patients;and whether duration of diabetes and level of Hb A1c affect the agreement.


Ankara Training and Research Hospital, Ankara, Turkey.


The CT was measured in 127 patients with DM, and 137 age and sex matched healthy controls sequentially by Pentacam, SM, and UP. Also diabetic subjects were subdivided according to duration of diabetes and Hb A1c levels. Pearson correlation analysis, linear regression analysis, and Bland-Altman plots were used for examination of agreement.


We found an excellent and statistically significant correlation of CT measurements between Pentacam – SM (R2 = 0.768; R2 = 0.855), Pentacam – UP (R2 = 0.546; R2 = 0.652), and SM – UP (R2 = 0.759; R2 = 0.797) in diabetic and control group, respectively. We performed further comparisons of the pair of instruments using the Bland-Altman analysis, andthe mean difference between pair of methods were much smaller for SM - UP pair (-4.20 ± 9.79 in diabetic, and -4.58 ± 8.08in control group).


SM – UP pair showed a higher agreement in diabetic patients. According to subgroup analyses, Hb A1c level, rather than the duration of diabetes, may determine the agreement of these pachymetry devices.But the difference of CT measurements between devices can stil influence clinical diagnosis and treatment. Therefore these methods are not completely interchangeable.

Financial Disclosure:


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