Abstract
Background. When changing from previously used time domain OCTs (TD-OCT) to frequency domain OCTs (FD-OCT) the question arises how to evaluate the progress of macular disease. Methods. OCT examinations and calculation (mapping) of the central retinal thickness were carried out in 40 healthy eyes with the Stratus OCT (R) (Carl Zeiss Meditec Inc.; TD-OCT) as well as the Spectralis-OCT (R) ...
Abstract
Background. When changing from previously used time domain OCTs (TD-OCT) to frequency domain OCTs (FD-OCT) the question arises how to evaluate the progress of macular disease. Methods. OCT examinations and calculation (mapping) of the central retinal thickness were carried out in 40 healthy eyes with the Stratus OCT (R) (Carl Zeiss Meditec Inc.; TD-OCT) as well as the Spectralis-OCT (R) (Heidelberg Engineering GmbH 2008; FD-OCT). Results. The average central macular thickness was 218 mu m in the Stratus OCT (R) and 282 mu m in the Spectralis-OCT (R). The average difference was 69 mu m (p < 0.001). The mean value of single measurements showed a macular thickness of 195 mu m when performed with the Stratus OCT (R) and of 235 mu m with the Spectralis-OCT (R). The difference of 40 mu m was statistically significant (p < 0.001).
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