title: Effects of yellow filter glasses on the results of photopic and scotopic photometry.
abstract: I measured the luminosity of a white surface with seven different yellow filter glasses and a photometer with two different sensitivities, which resembled the photopic and scotopic sensitivity of a Commission Internationale d'Eclairage standard observer. When measured with filters GG 400, GG 420, GG 435, and GG 455, there was a small and almost equal reduction in the relative photopic and scotopic luminosities. Measured with filters GG 475, GG 495, and OG 515, there was a more marked reduction in the scotopic luminosities than in the photopic luminosities.
authors: Department of Ophthalmology, Satakunta Central Hospital, Pori, Finland.
authors: E A
authors: EA
authors: Aarnisalo
mesh_terms: D000222:Adaptation, Physiological; D003116:Color; D003623:Dark Adaptation; D005139:Eyeglasses; D005374:Filtration; D006801:Humans; D008027:Light; D010783:Photometry / Q000379:methods*