The purpose of the present paper is to describe the transformation of a photopic ocular visibility curve into a photopic retinal visibility curve by applying suitable corrections for the absorption and reflection of light by the ocular media of the human eye. An examination of the photopic retinal visibility curve thus attained permits certain tentative conclusions to be drawn concerning the nature of the visual process at relatively high intensities of illumination.
The relative sensitivity of the human eye to light of different wavelengths at relatively high levels of illumination has been the subject of numerous investigations.1 The results of these experiments may be expressed in terms of "visibility" or "luminosity" curves. An ocular visibility curve is determined by finding, for different wavelengths of light, the amount of energy to which the eye must be subjected in order to produce a given sensation of brightness. From determinations made while
LUDVIGH E. DETERMINATION AND SIGNIFICANCE OF THE PHOTOPIC RETINAL VISIBILITY CURVE. Arch Ophthalmol. 1940;24(1):168–181. doi:10.1001/archopht.1940.00870010190016