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Roman Greslechner, Horst Helbig, Wolfgang Herrmann; Assesment of Anterior Chamber Depth: Pentacam vs. IOL-Master. Invest. Ophthalmol. Vis. Sci. 2011;52(14):4097.
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To asses and compare the anterior chamber depth (ACD) measured with two different anterior segment imaging techniques.
40 healthy eyes of 20 consecutive patients were included in this study. The mean age of the patients was 30,7 +/- 9,3 years (range 22-60 years). The mean spherical equivalent was -4,06 +/- 1,7 D. ACD was measured using IOL Master (Carl Zeiss Meditec) and Pentacam (Oculus Optikgeräte GmbH). The statistical significance of the interdevice differences between measurements was evaluated by paired T-test applying SPSS. P > 0,05 was considered statistically significant. While the IOL Master quantifies the distance between the anterior corneal surface and the anterior crystallline lens, the Pentacam calculates the space between corneal endothelium and the anterior surface of the lens. Thus IOL Master measurements where also compared with the sums of Pentacam-ACD and pachymetrical values.
The mean ACD was 3,64 +/- 0,37 mm with IOL-Master and 3,20 +/- 0,32 mm with Pentacam. When the ACD measured with Pentacam was corrected for corneal thickness, the mean value was 3,76+/- 0,31 mm. ACD measurements obtained by IOL Master were significantly greater compared to Pentacam. When taking the corneal thickness into account the difference between measurements was still statistically significant.
ACD differed significantly when measured with two different devices (IOL Master, Pentacam). This has to be taken into consideration when assesing the ACD with different modalities.
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