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. Author manuscript; available in PMC: 2008 Nov 25.
Published in final edited form as: J Opt Soc Am A Opt Image Sci Vis. 2005 Jan;22(1):60–67. doi: 10.1364/josaa.22.000060

Table 2.

Estimated Retinal Illuminance Values (Photopic Trolands)

Luminance (cd/m2) Standard Younger Older
30 435.2 497.2 187.0
5 72.5 82.9 31.2