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What is the Linear Cup/Disc area ratio?

April 26, 2017area Cup Disc linear ratio

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What is the Linear Cup/Disc area ratio?

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Linear cup/disc area ratio = average of the cup/disc diameter ratios (square root of cup/disc area ratio). The linear cup/disc ratio should be similar to the clinician’s assessment of cup/disc ratio, as it is an average of all cup/disc ratio measures along all the meridians.