title: Quantitative evaluation of pallor-disc ratio and colour of the optic disc by a photographic method.
abstract: A photographic technique is described, which is based on simultaneous photography of the papilla with green and red filters by means of a stereoscopic fundus camera. Using black and white film, the negatives are photometrically measured and the pallor-disc ratio and colour of the papilla are calculated from the densitometric tracings. The latter parameter is quantitatively expressed by a numerical index. The method is demonstrated in a practical example.
mesh_terms: D000328:Adult; D003124:Colorimetry; D003720:Densitometry; D005901:Glaucoma / Q000175:diagnosis*; D006801:Humans; D008297:Male; D009898:Optic Disk / Q000098:blood supply; D010781:Photography / Q000379:methods*