The effect on clinical judgements of new types of fluorescent lamp: I Experimental arrangements and clinical results

Lovett, P.A.; Halstead, M.B.; Hill, A.R.; Palmer, Dwight; Sonnex, T.S.; Pointer, Michael R.

doi:10.1177/096032719102300101

Cited by 14 publications

(12 citation statements)

References 4 publications

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“…This result is consistent with the United Kingdom Medical Research Council standard for fluorescent lighting in patient areas in hospitals: CCT around 4000 K and a high CRI (MRC [1965], cited in Lovett, Halstead, Hill, Palmer, Sonnex, and Pointer 1991). The initial recommendation was made following experimental trials using a variety of lamps ranging from 3000 K to 6500 K. A recent clinical trial of newly-developed lamps reiterated the earlier findings in that the fewest reported problems of colour appearance and difficulty of diagnosis occurred with lamps having colour temperatures around 4000 K and high CRI (Lovett et al 1991).…”

Section: Judgements Of Peoplementioning

confidence: 99%

A critical examination of perceptual and cognitive effects attributed to full-spectrum fluorescent lighting

Veitch¹,

McColl

2001

Ergonomics

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/npsi/ctrl?lang=en http://nparc.cisti-icist.nrc-cnrc.gc.ca/npsi/ctrl?lang=fr Access and use of this website and the material on it are subject to the Terms and Conditions set forth at http://nparc.cisti-icist.nrc-cnrc.gc.ca/npsi/jsp/nparc_cp.jsp?lang=en NRC Publications Archive Archives des publications du CNRCThis publication could be one of several versions: author's original, accepted manuscript or the publisher's version. / La version de cette publication peut être l'une des suivantes : la version prépublication de l'auteur, la version acceptée du manuscrit ou la version de l'éditeur. For the publisher's version, please access the DOI link below./ Pour consulter la version de l'éditeur, utilisez le lien DOI ci-dessous.http://dx.doi.org/10.1080/00140130010002008Ergonomics, 44, 3, pp. 255-279, 2001-02-01 A Critical examination of perceptual and cognitive effects attributed to full-spectrum fluorescent lightingA Critical examination of perceptual and cognitive effects attributed to full-spectrum fluorescent lighting Veitch, J. A.; McColl, S. L.A version of this paper is published in / Une version de ce document se trouve dans : Ergonomics, v. 44, no. 3, Feb. 2001, pp. 255-279 www.nrc.ca/irc/ircpubs NRCC-42840Veitch AbstractFull-spectrum fluorescent lighting has been credited with causing dramatic improvements in vision, perception, and cognitive performance, as compared to other fluorescent lamp types. These effects are hypothesised to occur because of similarity between FSFL emissions and daylight, which is said to have evolutionary superiority over other light sources. This review, covering the period 1945-1998, critically considers the evidence for these claims. In general, poor-quality research has resulted in an absence of simple deterministic effects that can be confidently attributed to fluorescent lamp type. Promising avenues for lighting-behaviour research include investigations of cognitive mediators of lighting-behaviour relationships, and flicker rates and colour rendering effects on visual processing, appearance judgements, and affect. Good lighting solutions are more complex than lamp type specification.

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Section: Judgements Of Peoplementioning

confidence: 99%

A critical examination of perceptual and cognitive effects attributed to full-spectrum fluorescent lighting

Veitch¹,

McColl

2001

Ergonomics

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“…[1][2][3][4][5][6][7] The effects of congenital red-green dichromasy have been represented in Figs. 3 and 4.…”

Section: Resultsmentioning

confidence: 99%

“…The selection of light sources for clinical observation has been the subject of a number of studies and standards, [1][2][3][4][5][6][7][8][9][10] although the earlier references [1][2][3] have been rendered obsolete by the changes in fluorescent tube technology and the standards written at the time 1,9 are similarly out dated. In particular, the change from halophosphate to triphosphor technology has dramatically changed lighting options.…”

Section: Introductionmentioning

confidence: 99%

“…1 is illustrated the difference between examples of these and a comparison with the distribution of a Planckian radiator at 4000 K which is considered the ''gold standard. '' 7 In some more recent studies of appropriate lighting, [4][5][6] the issue of cyanosis was not addressed. Their recommendation of Color 84 or 840 sources is based on dermatological needs.…”

Section: Introductionmentioning

confidence: 99%

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Color changes in cyanosis and the significance of congenital dichromasy and lighting

Dain

2007

Color Research & Application

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There are anecdotal reports of color vision deficient medical practitioners (particularly deuteranopes) having difficulty in recognizing cyanosis. An understanding of the color changes in oxygenated blood has led to a better understanding of the lighting needs for hospitals. Using the same database, this article investigates the propensity for color vision deficient observers to make mistakes with cyanotic patients. The possibilities for helping the observer with appropriate color of lighting are considered. The spectral reflectances of blood at varying oxygenation levels previously reported were used [Color Res Appl 1998; 23: 4-17; Lighting 1998; 65: 18-24] to calculate chromaticity and lightness. The direction of the chromaticity change was compared with the protanopic and deuteranopic confusion lines. An attempt was made to identify sources that enhanced color changes for the color deficient. The color change of blood oxygenation is closely aligned with the confusion lines of congenital dichromats (particularly protanopia) showing the potential for difficulty in making this decision. No source could be demonstrated to solve the problem or even reduce it significantly.

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“…In two images, the hue was altered as a decoy for the CVDs who might make decision on the basis of what looked normal or simply different from normal without regard to the nature of the difference. The white point of the monitor was set to approximate 4000 K, which is considered the "gold standard" for cyanosis observation [7,[11][12][13][14]. Twenty images were produced, see Fig.…”

Section: Methodsmentioning

confidence: 99%

Recognition of simulated cyanosis by color-vision-normal and color-vision-deficient subjects

Dain¹

2014

J. Opt. Soc. Am. A

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There are anecdotal reports that the recognition of cyanosis is difficult for some color-deficient observers. The chromaticity changes of blood with oxygenation in vitro lie close to the dichromatic confusion lines. The chromaticity changes of lips and nail beds measured in vivo are also generally aligned in the same way. Experiments involving visual assessment of cyanosis in vivo are fraught with technical and ethical difficulties A single lower face image of a healthy individual was digitally altered to produce levels of simulated cyanosis. The color change is essentially one of saturation. Some images with other color changes were also included to ensure that there was no propensity to identify those as cyanosed. The images were assessed for reality by a panel of four instructors from the NSW Ambulance Service training section. The images were displayed singly and the observer was required to identify if the person was cyanosed or not. Color normal subjects comprised 32 experienced ambulance officers and 27 new recruits. Twenty-seven color deficient subjects (non-NSW Ambulance Service) were examined. The recruits were less accurate and slower at identifying the cyanosed images and the color vision deficient were less accurate and slower still. The identification of cyanosis is a skill that improves with training and is adversely affected in color deficient observers.

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The effect on clinical judgements of new types of fluorescent lamp: I Experimental arrangements and clinical results

Cited by 14 publications

References 4 publications

A critical examination of perceptual and cognitive effects attributed to full-spectrum fluorescent lighting

A critical examination of perceptual and cognitive effects attributed to full-spectrum fluorescent lighting

Color changes in cyanosis and the significance of congenital dichromasy and lighting

Recognition of simulated cyanosis by color-vision-normal and color-vision-deficient subjects

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