Agreement between optical coherence tomography and digital stereophotography in vertical cup-to-disc ratio measurement
Abstract
Background Given the increasing popularity of optical coherence tomography in the diagnosis of glaucoma, we aimed to assess agreement
between StratusOCT and stereophotography in measuring the vertical cup-to-disc ratio (VCDR) and examine whether it can be
improved by changing the StratusOCT cup-offset.
Methods In group 1 (79 eyes), VCDR measurements obtained by StratusOCT (using the default cup-offset of 150 μm above the retinal pigment
epithelium) and stereophotography were compared. For each eye, the cup-offset was moved upward or downward until the difference
disappeared and an adjusted cup-offset was identified. In group 2 (41 eyes), the stereophotography VCDR was compared ...
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