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

Abstract：

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.

journal_name

Ophthalmology

journal_title

Ophthalmology

authors

Enyedi LB,Dev S,Cox TA

doi

10.1016/S0161-6420(98)95029-1

subject

Has Abstract

pub_date

1998-05-01 00:00:00

pages

871-3

issue

5

eissn

0161-6420

issn

1549-4713

pii

S0161-6420(98)95029-1

journal_volume

105

pub_type

临床试验,杂志文章,随机对照试验

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