作者: Saul M Luria
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摘要: Abstract : Detection and resolution thresholds for blue yellow targets against blue, green, backgrounds were measured while wearing filters. Yellow filters improved backgrounds. Their effectiveness decreased (i) as the wavelength of background increased, (ii) size target decreased, (iii) with age observer. The generally ineffective. results are most part explained on basis changes in contrast brought about by facemasks divers under certain conditions is discussed.