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Journal of Ophthalmology
Volume 2013 (2013), Article ID 687165, 6 pages
Clinical Study

Diurnal Choroidal Thickness Changes in Normal Eyes of Turkish People Measured by Spectral Domain Optical Coherence Tomography

1Beyoglu Eye Training and Research Hospital, Retina Clinic, Istanbul 34421, Turkey
2Istanbul Medeniyet Unıversity, Istanbul, Turkey

Received 21 December 2012; Accepted 24 February 2013

Academic Editor: Yoshinori Mitamura

Copyright © 2013 Ozen Ayrancı Osmanbasoglu et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.


Purpose. To analyse the diurnal variation of central choroidal thickness (CCT) in healthy emetropic patients during working hours. Methods. Fifty healthy young emmetrpic volunteers were included in this study. CCT was measured at 9 AM and 4 PM with spectral domain optical coherence tomography (Spectralis, Heidelberg Engineering) with enhanced depth imaging. Diurnal variation of CCT, the correlation between rigth and left eyes and the demographic factors affecting this variation were assessed. Findings. The mean CCT at 9 AM and 4 PM was 308.7 ± 64.5 μm and 308.7 ± 62 μm, respectively, with a mean diurnal amplitude of −0.03 ± 14.7 μm, ranging between −55 μm and 47 μm, the difference was statistically insignificant ( : 0.9). There were positive correlations between right and left eyes among CCT measurements at 9 AM, 4 PM and the mean amplitude of diurnal change ( : 0.65, ; : 0.60, ; : 0.45, : 0.00, resp.). There was a statistically significant negative correlation between the magnitude of diurnal change and age ( : −0.27, : 0.01). Conclusion. Although the mean CCT in the all group does not show significant variation during working hours, the pattern of diurnal variation may vary from person to person according to age, and there is a great harmony between the two eyes.