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Ratio of foveal thickness to choroidal thickness in caucasians
Author(s) -
SCHMIDBAUER M
Publication year - 2012
Publication title -
acta ophthalmologica
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.534
H-Index - 87
eISSN - 1755-3768
pISSN - 1755-375X
DOI - 10.1111/j.1755-3768.2012.s030.x
Subject(s) - foveal , ophthalmology , optical coherence tomography , medicine , retinal , fovea centralis , materials science , optics , physics
Purpose To examine the potential dependence of foveal thickness on subfoveal choroidal thickness and associated factors. Methods Patients without any macular or optic nerve disease and attending the clinic for cataract surgery underwent biometry and enhanced depth imaging of the deep retinal and choroidal layers by spectral domain optical coherence tomography (SD‐OCT, Spectralis). Results The study included 47 patients (24 women) with a mean age of 73.4 ± 7.3 years (range: 57.1 – 87.4 years) and mean axial length of 23.56 ± 0.88 mm (range: 21.65 – 25.47mm). The ratio of foveal thickness to subfoveal choroidal thickness (RFTCT) was 1.11 ± 0.48 (median: 1.06; range: 0.41‐2.60). In multivariate analysis, RFTCT increased significantly with longer axial length (non‐standardized regression coefficient B: 0.21; standardized correlation coefficient ß= 0.39; P =0.006) and older age (B:0.02; ß= 0.35; P=0.01). Conclusion In elderly Caucasians, mean foveal thickness was about 11% higher than subfoveal choroidal thickness. For each mm increase in axial length, and for each increase in year of age, the ratio of foveal thickness to subfoveal choroidal thickness increased by 20 percentage points and by 2 percentage points, respectively. With increasing axial length, and with higher age, the choroidal thickness changes more marked than the foveal thickness changes.