Dependence of Anomaloscope Matching on Viewing-Distance or Field-Size

摘要: IN a recent communication bearing the above title1, we pointed out that with particular anomaloscope R/G ratio in mixture required to match narrow-band yellow depended on viewing distance. Further work more than forty normal observers has confirmed this effect, and also established fact effect for each observer is substantially same whether one eye used or two eyes, as original investigation. Most green greater Taking unity an 18-mm. field at 60 cm. (subtending 2°), drops decreasing rate average value of about 0·85 300 (20 ft.), beyond which there little further change. The spread results different individuals considerable, some dropping below 0·6.