Optics and Visual Physiology

Ogle, Kenneth N.

doi:10.1001/archopht.1952.01700030820012

Archives of Ophthalmology

1952

DOI: 10.1001/archopht.1952.01700030820012

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Optics and Visual Physiology

Kenneth N. Ogle¹

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1956

1993

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Cited by 4 publications

(1 citation statement)

References 197 publications

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“…The surprising fact, reported by a variety of researchers including J.M. and others (Ogle, 1951;Graham, 1965;Borish, 1970;Rea, Ouellette and Tiller, 1990; Nakayama and Shimizu, 1991; Saito and Hosokawa, 1991), is that pupil size has a small effect on performance. it take very sensitive psychophysical techniques to measure any differential effects on performance due to pupil size over the range of naturally occurring pupil sizes typically encountered in electrically illuminated environments (pupil diameters between 2.5 and 5 mm for luminance levels between 350,000 and 0.5 cdfm2, respectively).…”

mentioning

confidence: 97%

Luminance-Controlled Pupil Size Affects Landolt C Task Performance

Berman

Fein

Jewett

et al. 1993

Journal of the Illuminating Engineering Society

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Subjects judged the orientation of a 2 min. gap Landolt C located at a distance of 2.4 m. The stimuli were presented in central vision on a CRT, at low to medium contrast. The effects of varying the spectrum and luminance of surround lighting were assessed on both pupil size (measured using infrared pupillometry during task performance) and task accuracy. The task display was protected from the surround lighting, so that its luminance and contrast could be varied independently of the changes in the surround lighting. Indirect surround illumination was provided by . either two illuminants of very different scotopic spectral content but with the same · photopic luminance (Experiment 1 and 3 each), or by using the same illuminant at two different luminance levels (Experiment 2). In experiment 3, the effect of changing surround spectrum was compared to the effect of varying task background luminance between 12 cd/m2 and 73 cdfm2. In all experiments, scotopically enhanced surround lighting produced pupil areas which were reduced by almost 50% in comparison with surround lighting with relatively less scotopic luminance.Concomitantly there was improvement in Landolt C task performance with the scotopically enhanced surround lighting at all contrast and luminance levels. In these experiments, smaller pupil sizes were associated with significantly better visual-task performance in spite of lower task retinal illuminance when compared to the condition with larger pupils. These results suggest that changes in surround spectrum can compensate for the effect on task performance of a reduction in task luminance and supports the possibility that lighting energy savings can accrue in the workplace by shifting lamp spectra to obtain greater scotopic efficacy.

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mentioning

confidence: 97%

Luminance-Controlled Pupil Size Affects Landolt C Task Performance

Berman

Fein

Jewett

et al. 1993

Journal of the Illuminating Engineering Society

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Stereopsis and Unequal Luminosities of the Images in the Two Eyes

Ogle¹,

Groch²

1956

Archives of Ophthalmology

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Present Status of Our Knowledge of Stereoscopic Vision

Ogle¹

1958

Archives of Ophthalmology

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Optics and Visual Physiology

Cited by 4 publications

References 197 publications

Luminance-Controlled Pupil Size Affects Landolt C Task Performance

Luminance-Controlled Pupil Size Affects Landolt C Task Performance

Stereopsis and Unequal Luminosities of the Images in the Two Eyes

Present Status of Our Knowledge of Stereoscopic Vision

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