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Comparison of captured total retinal area. a Retinal image captured by Optos®. b Retinal image captured by Clarus™. The blue line excluding the yellow dotted line, which indicates an obscured area, shows the area of visible retina and the red line shows the optic nerve head in (a) and (b). c Captured total retinal area shows significantly higher values in Optos® images than in Clarus™ images (465 ± 117 vs. 243 ± 39 DA, ***P < 0.001). DA: disc area
