A comparison of the Marcus Gunn and alternating light tests for afferent pupillary defects.

Published

Journal Article

OBJECTIVE: The authors compared two methods, the Marcus Gunn test and the alternating light test, for detecting a relative afferent pupillary defect. DESIGN: A randomized, prospective clinical trial. PARTICIPANTS: Fourteen patients with unilateral optic neuropathy. INTERVENTION: The Marcus Gunn and alternating light tests were performed on each patient. MAIN OUTCOME MEASURES: The results of the Marcus Gunn and altemating light tests for detecting a relative afferent pupillary defect on the affected side. RESULTS: The Marcus Gunn test was able to identify the affected eye in only 8 of 14 patients, whereas the alternating light test correctly identified the affected eye in 13 of 14 patients. Results of the Marcus Gunn test were indeterminate in 4 of 14 patients and were incorrect in 2 of 14 patients. Results of the alternating light test were indeterminate in one patient and never incorrectly identified the affected eye. CONCLUSION: The alternating light test is superior to the Marcus Gunn test for detecting relative afferent pupillary defects.

Full Text

Duke Authors

Cited Authors

  • Enyedi, LB; Dev, S; Cox, TA

Published Date

  • May 1998

Published In

Volume / Issue

  • 105 / 5

Start / End Page

  • 871 - 873

PubMed ID

  • 9593390

Pubmed Central ID

  • 9593390

International Standard Serial Number (ISSN)

  • 0161-6420

Digital Object Identifier (DOI)

  • 10.1016/S0161-6420(98)95029-1

Language

  • eng

Conference Location

  • United States