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Optic Disc Area

  • Disc Area remains largely stable throughout life but there are ethnic variations
  • Normal mean disc area is 2.27 mm² (st. dev ±0.412)

Distribution of Disc Area from Marsh et al. 2010

Variation in Disc Area by Ethnicity from Girkin et al. 2011

Area of Descent African European Hispanic Indian Japanese
Mean Disc Area in mm² (SD) 2.09 (0.41) 1.81 (0.38) 2.06 (0.37) 2.03 (0.31) 1.93 (0.37)

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