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  • Title: Calculating photopic illuminance.
    Author: Baron WS, Enoch JM.
    Journal: Am J Optom Physiol Opt; 1982 Apr; 59(4):338-41. PubMed ID: 7102791.
    Abstract:
    A procedure is proposed for computing the visual effectiveness of light incident on the retina considering the directional sensitivity of the underlying photoreceptor population. A half-sensitivity half-width measurement of the retinal directional sensitivity provides the basis for integrating a parabolic approximation to the directional sensitivity over the pupillary area penetrated by the incident light.
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