Assessment of Macular Thickness in Healthy Eyes Using Cirrus HD-OCT: A Cross-Sectional Study

Mohammad Rasoul SABOURI, Ehsan KAZEMNEZHAD, Vahideh HAFEZI


We aimed to determine normal macular thickness using Cirrus high definition optical coherence tomography. In this cross-sectional survey, 112 subjects were selected using random sampling from the Rasht telephone directory. All subjects underwent complete eye examinations. Both eyes of each patient were evaluated. The creation of a macular thickness map using a macular cube 512 × 128 combo was optional. The average thickness of the retina was determined in 9 Early Treatment Diabetic Retinopathy Study (ETDRS) regions. To assess reproducibility and system reliability, the thickness of the retina was measured up to 5 times in 10 healthy subjects. The coefficient of variation was then calculated for each individual. The coefficient of variation of macular thickness within 1 mm of the center was 0.15 - 1.33%. The means and standard deviations of central subfield thickness (CST), macular thickness (MT), and macular volume (MV) were 245.44 ± 20.39 µm, 277.9 ± 12.0 µm, and 9.98 ± 0.43 mm3, respectively. The mean CST (P < 0.0001), MT (P = 0.038), and MV (P = 0.030) were significantly higher in men than in women. In addition, regardless of age or sex, macular thickness increased when moving from within 1 mm of the center to 3 mm and 6 mm away from the center, so that the upper 3 mm (S3) was the thickest region, and the temporal 6 mm (T6) was the thinnest region in the ETDRS regions. The mean MT of healthy subjects was 280.67 ± 12.79 µm in men and 276.63 ± 11.61 µm in women. Therefore, the macula is significantly thicker in men than in women (P = 0.038).



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