Journal article

Color vision testing by farnsworth lantern and ability to identify approach-path signal colors

Barry L Cole, Jennifer D Maddocks

AVIATION SPACE AND ENVIRONMENTAL MEDICINE | AEROSPACE MEDICAL ASSOC | Published : 2008

Abstract

INTRODUCTION: It is presumed that pilots with abnormal color vision who pass the Farnsworth lantern test can distinguish aviation signal lights including the red and white lights of the Precision Approach Path Indicator (PAPI). The investigation of the FedEx Flight 1478 crash at Tallahassee airport in 2002 raises doubts about this presumption. It found a contributory factor was that the pilot had difficulty distinguishing the PAPI signals because of his deficient color vision (DCV) even though he had passed the Farnsworth lantern. This paper reports on the ability of subjects with DCV who pass the Farnsworth lantern to distinguish PAPI signal colors. METHODS: Under a good visibility and a ma..

View full abstract

University of Melbourne Researchers