2M.D. Asistant, Erciyes University Faculty of Medicine, Department of Ophthalmology, Kayseri/TURKEY
3M.D. Asistant Professor, Erciyes University Faculty of Medicine, Department of Ophthalmology, Kayseri/TURKEY
4M.D. Associate Professor, Erciyes University Faculty of Medicine, Department of Ophthalmology, Kayseri/TURKEY Purpose: To examine the pattern and the magnitude of diurnal variation of central choroidal thickness in healthy Turkish subjects measured by spectral-domain optical coherence tomography.
Materials and Methods: This study included thirty eyes of 15 volunteers with no retinal or choroidal disease and refractive error, who underwent high-definition raster scanning using SD-OCT on the same day at 10 fixed, one-hour time intervals beginning from 8 AM using a standardized protocol.
Results: The mean choroidal thickness at the center of the fovea showed a relative peak early in the morning hours at 8 AM with a mean thickness measurement of 317.06±45.42 μm. When we evaluate the thickness measurements we found a progressive decrease during the day. The mean choroidal thickness was 274.83± 48.46 μm at 5:00 PM which was the thinnest value of the day.
Conclusions: Choroidal thickness may vary with time during the day and this should be considered when evaluating choroidal thickness.
Keywords : Diurnal variation, choroidal thickness