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Variance owing to observer, repeat imaging, and fundus camera type on cup-to-disc ratio estimates by stereo planimetry.
Kwon Young H, Adix Michael, Zimmerman M Bridget, Piette Scott, Greenlee Emily C, Alward Wallace L M et al.
J GlaucomaApr 200916 citationsCase Series
This study found expert variability was the largest factor in cup-to-disc ratio measurements, exceeding camera or repeat imaging differences. Automated planimetry reduced variability, improving glaucoma assessment consistency.