OSA's Digital Library

Journal of the Optical Society of America A

Journal of the Optical Society of America A

| OPTICS, IMAGE SCIENCE, AND VISION

  • Editor: Franco Gori
  • Vol. 29, Iss. 2 — Feb. 1, 2012
  • pp: A377–A382

The Farnsworth Flashlight is not equivalent to the Farnsworth Lantern

Stephen Dain  »View Author Affiliations


JOSA A, Vol. 29, Issue 2, pp. A377-A382 (2012)
http://dx.doi.org/10.1364/JOSAA.29.00A377


View Full Text Article

Enhanced HTML    Acrobat PDF (823 KB)





Browse Journals / Lookup Meetings

Browse by Journal and Year


   


Lookup Conference Papers

Close Browse Journals / Lookup Meetings

Article Tools

Share
Citations

Abstract

The Farnsworth Lantern has been accepted in many occupational applications. Modern instruments purporting to be equivalent were inevitable given the ubiquity of its use. The OPTEC900® (Stereo Optical) has been validated and adopted as an acceptable substitute, although the fail rate is slightly higher. The Farnsworth Flashlight (Gulden Ophthalmics) has been marketed without validation. The color and luminous intensities of the three lanterns’ stimuli were measured using a Topcon SR-3 telespectroradiometer and compared with Farnsworth’s recommendations. The OPTEC900® chromaticities comply with Farnsworth’s recommendations, but the luminous intensities are rather different. The Farnsworth Flashlight differs from the Farnsworth Lantern in both chromaticity and luminous intensities. A cheap and portable equivalent to the Farnsworth Lantern is a highly attractive product. However, the Farnsworth Flashlight is significantly different in construction from the Farnsworth Lantern.

© 2012 Optical Society of America

OCIS Codes
(330.0330) Vision, color, and visual optics : Vision, color, and visual optics
(330.1690) Vision, color, and visual optics : Color

ToC Category:
Variations and deficiencies of color vision

History
Original Manuscript: September 1, 2011
Revised Manuscript: December 12, 2011
Manuscript Accepted: December 12, 2011
Published: February 2, 2012

Virtual Issues
Vol. 7, Iss. 4 Virtual Journal for Biomedical Optics

Citation
Stephen Dain, "The Farnsworth Flashlight is not equivalent to the Farnsworth Lantern," J. Opt. Soc. Am. A 29, A377-A382 (2012)
http://www.opticsinfobase.org/josaa/abstract.cfm?URI=josaa-29-2-A377


Sort:  Author  |  Year  |  Journal  |  Reset  

References

  1. A. J. Vingrys and B. L. Cole, “Validation of the Holmes–Wright lanterns for testing colour vision,” Ophthalmic Physiol. Opt. 3, 137–152 (1986).
  2. H. Schmidgen, “The Donders machine: matter, signs, and time in a physiological experiment, ca. 1865,” Configurations 13, 211–216 (2005).
  3. W. Thomson, “A lantern for detecting color-blindness in railroad employees,” Trans. Am. Ophthalmol. Soc. 9, 189–192 (1900).
  4. C. H. Williams, “An improved lantern for testing color-perception,” Trans. Am. Ophthalmol. Soc. 9, 192–196 (1900).
  5. D. Farnsworth and P. Foreman, Development and Trial of New London Navy Lantern as a Selection Test for Serviceable Color Vision (Naval Submarine Medical Research Laboratory, 1946).
  6. B. L. Cole, K. Y. Lian, and C. Lakkis, “Color vision assessment: fail rates of two versions of the Farnsworth lantern test,” Aviat. Space Environ. Med. 77, 624–630 (2006).
  7. Commission Internationale de l’Éclairage and I. S. Organisation, “CIE Standard Colorimetric Observers” (CIE, 2008).
  8. J. M. Stelman, Encyclopaedia of Occupational Health and Safety (International Labour Office, 1999), Vol. 1.
  9. T. Fujine, T. Kanda, Y. Yoshida, M. Sugino, M. Teragawa, Y. Yamamoto, and N. Ohta, “Bit depth needed for high image quality TV-evaluation using color distribution index,” J. Disp. Technol. 4, 340–347 (2008). [CrossRef]
  10. W. D. Wright, Researches on Normal and Defective Colour Vision (Henry Kimpton, 1946).
  11. K. V. Laxar, S. L. Wagner, and T. C. C., “Evaluation of the Stereo Optical Farnsworth Co. Lantern (FALANT) color perception test: A specification and performance comparison with the original FALANT” (Naval Submarine Medical Research Laboratory, 1998).

Cited By

Alert me when this paper is cited

OSA is able to provide readers links to articles that cite this paper by participating in CrossRef's Cited-By Linking service. CrossRef includes content from more than 3000 publishers and societies. In addition to listing OSA journal articles that cite this paper, citing articles from other participating publishers will also be listed.


« Previous Article  |  Next Article »

OSA is a member of CrossRef.

CrossCheck Deposited