Please use this identifier to cite or link to this item: http://hdl.handle.net/10397/7823
Title: Pentacam pachometry : comparison with non-contact specular microscopy on the central cornea and inter-session repeatability on the peripheral cornea
Authors: Lam, AKC 
Chen, D
Keywords: Corneal thickness
Pentacam
Specular microscopy
Issue Date: 2007
Publisher: Wiley-Blackwell
Source: Clinical and experimental optometry, 2007, v. 90, no. 2, p. 108-114 How to cite?
Journal: Clinical and experimental optometry 
Abstract: Purpose: Our aim was to compare specular microscopy (SM) and a new corneal topographer with rotating Scheimpflug camera (Pentacam) for non-contact pachometry of the central cornea. The repeatability of Pentacam for topographic pachometry was also studied. Methods: Thirty-nine subjects were recruited and one eye was selected randomly for non-contact pachometry by SM and by Pentacam, in random order. The corneal thickness (CT) was monitored at 30-second intervals for 10 minutes. Baseline CT was defined as the average of all measurements taken over the 10 minutes. Subjects were required to return within one to two weeks for a second corneal evaluation by Pentacam. Comparisons were made on the central CT between the two devices and on the topographic CT from Pentacam between the two visits. Results: The spontaneous variation of central CT was similar for the two instruments. Central CT varied within ±2.3 μm during the 10 minutes. The 95% limits of agreement between SM and Pentacam were within ±15 μm for the central CT. The spontaneous variation of peripheral CT was within ±3.1 μm. There was no significant difference (p > 0.05) between the two visits on CT at different regions. Further analysis found that with Pentacam three measurements should be taken to obtain topographic CT measurement of one per cent precision. Conclusion: Non-contact specular microscopy and Pentacam have good agreement for central CT measurement. Topographic pachometry from Pentacam requires three repeated measurements for one per cent precision.
URI: http://hdl.handle.net/10397/7823
ISSN: 0816-4622
EISSN: 1444-0938
DOI: 10.1111/j.1444-0938.2006.00103.x
Appears in Collections:Journal/Magazine Article

Access
View full-text via PolyU eLinks SFX Query
Show full item record

SCOPUSTM   
Citations

27
Last Week
0
Last month
0
Citations as of Sep 19, 2017

WEB OF SCIENCETM
Citations

24
Last Week
0
Last month
Citations as of Sep 21, 2017

Page view(s)

32
Last Week
1
Last month
Checked on Sep 17, 2017

Google ScholarTM

Check

Altmetric



Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.