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Updated: Jun 3, 2026
Doppler Optical Coherence Tomography of Retinal Circulation
Published on: September 18, 2012
Repeatability of optic nerve head parameters measured by spectral-domain OCT in healthy eyes
Giacomo Savini1, Michele Carbonelli, Vincenzo Parisi
1G.B. Bietti Eye Foundation-IRCCS, Rome, Italy. giacomo.savini@alice.it
Background And Objective:
To evaluate the repeatability of optic nerve head (ONH) measurements by spectral-domain optical coherence tomography.
Patients And Methods:
Three scans were acquired in 32 healthy subjects during one session. Using Cirrus HD-OCT (Carl Zeiss Meditec, Dublin, CA), the cup-to-disc ratio (CDR), disc area, rim area, cup volume, and horizontal and vertical CDRs were investigated. Repeatability was assessed by the coefficient of variation (COV), the test-retest intrasession variability, and the intraclass correlation coefficient (ICC).
Results:
Good repeatability was achieved for all parameters, with a COV of 4.23% or less and ICCs of 0.98 or greater for all measurements. Test-retest intrasession variability was 0.024 for CDR, 0.121 mm(2) for disc area, 0.087 mm(2) for rim area, 0.017 mm(3) for cup volume, and 0.048 for horizontal and vertical CDR.
Conclusion:
In healthy eyes, Cirrus HD-OCT provides repeatable measurements of ONH parameters.
