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natural pupil luminance
luminance of a source which, when viewed with the natural pupil, produces the same conventional retinal illuminance as that source viewed with a specified artificial pupil
Note 1 to entry: The natural pupil luminance is expressed in candela (cd), candela per square metre times square millimetre (cd⋅m−2⋅mm2), or troland.
Note 2 to entry: This entry was numbered 17-802 in CIE S 017:2011.