PMID: 11927439Apr 3, 2002Paper

Greater pupillary escape differentiates central from peripheral visual field loss

Ophthalmology
Oliver Bergamin, Randy Kardon

Abstract

To test whether pupil escape observed during a constant light stimulus was greater in eyes with central visual field loss compared to eyes with peripheral visual field loss and normal eyes. Comparative, observational case series. Twenty-seven normal subjects, 5 patients with central field loss, 11 patients with peripheral field loss, and 8 patients with combined loss (central and peripheral visual field loss) were tested. A dual-channel infrared pupillograph was used to simultaneously record the right and left pupil diameters at a rate of 60 Hz to characterize the initial, phasic pupil contraction, and the sustained, or prolonged, pupil contraction in response to a 5-second light stimulus. Full-field light stimuli with a diameter of 30 degrees were presented to each eye at seven different intensities. The amplitude of the phasic pupil contraction was compared with the amplitude of the sustained pupil contraction at the four brightest intensities (slope of phasic versus sustained contraction) in the normal eyes and in eyes with visual field loss in the center and the periphery. The sustained pupillary contraction showed a statistically greater reduction in proportion to the phasic component in eyes with central field loss compar...Continue Reading

References

Jul 1, 1992·Neurology·T A Cox
Jan 1, 1989·Neurology
Jan 1, 1983·Vision Research·F Sun, L Stark
Jul 1, 1981·Survey of Ophthalmology·H S ThompsonT A Cox
Nov 1, 1995·American Journal of Ophthalmology·A KawasakiR H Kardon
Jun 1, 1994·Ophthalmology·N A Zabriskie, R H Kardon
Jul 1, 1993·Archives of Ophthalmology·R A BellC E Yee
Mar 15, 1993·American Journal of Ophthalmology·R H KardonH S Thompson
Dec 1, 1996·American Journal of Ophthalmology·A KawasakiR H Kardon
Apr 9, 1998·Journal of Neuro-ophthalmology : the Official Journal of the North American Neuro-Ophthalmology Society·E T Ajax, R Kardon
Jul 1, 1998·Graefe's Archive for Clinical and Experimental Ophthalmology = Albrecht Von Graefes Archiv Für Klinische Und Experimentelle Ophthalmologie·W D Lagrèze, R H Kardon
Nov 1, 1959·Archives of Ophthalmology·P LEVATIN

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Citations

Feb 13, 2003·Ophthalmology·Terry A Cox
Sep 27, 2007·Journal of Neuro-ophthalmology : the Official Journal of the North American Neuro-Ophthalmology Society·Aki Kawasaki, Randy H Kardon

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