|Document ID (ISN)||76079|
|ISSN - Serial title
||0095-6562 - Aviation, Space, and Environmental Medicine
|Convention or series no.
||Performance of red-green color deficient subjects on the Holmes-Wright lantern (type A) in photopic viewing
||Sep. 1999, Vol.70, No.9, p.897-901. 17 ref.
||The Holmes-Wright lantern is an approved occupational colour vision test for airline pilots within the European Union and for specific occupations in the British Armed Forces. The colours shown are red, green and white signal lights. The Holmes-Wright lantern is a sensitive screening test for red-green colour deficiency in photopic viewing and the pass/fail level is similar to that of the Farnsworth Lantern (Falant) if the same scoring method is applied. 138 colour deficient subjects identified with the lshihara plates and diagnosed with the Nagel anomaloscope completed a colour vision test battery which included three runs of the nine colour pairs of the Holmes-Wright lantern at high brightness in normal room illumination. The Holmes-Wright lantern was found to be a sensitive screening test for red-green colour deficiency. Although a similar percentage of anomalous trichromats fail the Holmes-Wright lantern as fail the Falant, the superior correlation between the Holmes-Wright result and other colour vision tests designed to grade the severity of colour deficiency suggests that the two lantern results are not equivalent.
||colour vision deficiency; aircraft pilots; colour vision
||visual performance; vision tests
||D - Periodical articles
|Country / State or Province||United Kingdom|
||Lighting, colour and vision
|Broad subject area(s)
||Diseases of the eye and vision damage