FALANT

(redirected from Farnsworth Lantern)
AcronymDefinition
FALANTFarnsworth Lantern (color vision test)
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TABLE 1: Color Vision Deficient Groups Extent Selection Criteria Deutan Protan Mild anomalous Pass Farnsworth lantern, pass 5 5 trichromats Farnsworth-Munsell Panel D-15 Moderate anomalous Fail Farnsworth lantern, pass 5 5 trichromats Farnsworth-Munsell Panel D-15 Strong anomalous Fail Farnsworth-Munsell Panel 5 5 trichromats D-15 (but not dichromats or extreme anomalous trichromats (a)) Dichromats Match whole red-green range on 10 9 Nagel anomaloscope even after adaptation on Trendelenberg plate Note.
(9) Only the Beyne Lantern (France), the Farnsworth Lantern (FALANT) (USA) and the H-W lanterns, Type A and B (UK) were approved.
In a clinical evaluation of the ChromaGen lens system, it was reported that like the X-Chrom lens, it does a fairly good job with helping patients to pass the Ishihara test, but its effects on the Farnsworth D15 and the Farnsworth Lantern vary greatly among patients, with most still failing these tests.