41
Views
7
CrossRef citations to date
0
Altmetric
ORIGINAL PAPER

The Pupil Response to Large Regional Stimuli in Patients with Focal Visual Field Loss

, , &
Pages 143-147 | Accepted 22 Aug 2005, Published online: 08 Jul 2009
 

Abstract

Objective: To develop and use an intraocular analysis of the focal pupil response to large-sized, regional stimuli as a means of detecting areas of visual field loss. Patients and methods: A total of 42 normal subjects and 14 patients were tested with automated threshold perimetry and infrared pupillometry using computer-controlled, large-sized light stimuli (arcuate and quadrant shaped) at 10 apostilb intensity. These novel stimuli were presented (0.2 second duration) to different regions of the visual field of each eye. Each stimulus sequence was repeated 6 times. Results: A regional pupil deficit was detected in 7 of 12 eyes of 14 patients with visual dysfunction. The regional pupil response correctly corresponded to the visual field in 93 of 156 (60%) regions tested in the 14 patients. Conclusion: Detection of regional pupil deficits using large-sized light stimuli generally underestimates the degree of visual dysfunction as compared to automated threshold perimetry. One reason may be that retinal ganglion cells subserving the afferent pupillomotor pathway have larger receptive fields and greater spatial summation properties compared with those subserving the cortical visual pathway.

Log in via your institution

Log in to Taylor & Francis Online

PDF download + Online access

  • 48 hours access to article PDF & online version
  • Article PDF can be downloaded
  • Article PDF can be printed
USD 65.00 Add to cart

Issue Purchase

  • 30 days online access to complete issue
  • Article PDFs can be downloaded
  • Article PDFs can be printed
USD 455.00 Add to cart

* Local tax will be added as applicable

Related Research

People also read lists articles that other readers of this article have read.

Recommended articles lists articles that we recommend and is powered by our AI driven recommendation engine.

Cited by lists all citing articles based on Crossref citations.
Articles with the Crossref icon will open in a new tab.