The scattering theory of the effect of glare on the brightness difference threshold

摘要: The introduction of light sources into the visual field results, as is well known, in an increase brightness difference threshold for foveal vision. Several extensive investigations this effect have been carried out last few years, and values under different conditions glare related to physical variables, such angular seperation between source test object. Holladay, whom one these experimental due, puts forward theory, following a suggestion Raman, that raised owing increased illumination fovea centralis by scattered media eye, pencil from source, its passage cornea retina. Holladay applies Rayleigh's scattering formula compute onto way, argues therefrom way which will vary with change angle. Holladay's discussion subject criticism on grounds: (1) it fails make clear part played pupil aperture; (2) treats white monochromatic applying formula; (3) neglects collateral deduction magnitude coefficient eye must posses order produce enough explain observed increases threshold. object present paper give brief sketch above defects removed, compare results recent measurements, predictions theory.