Comparison of eccentric fixation measurements using the streak target of an ophthalmoscope and a traditional visuoscopy target

Jeffrey Cooper, Ilana Gelfond, Pamela E. Carlson, Brian Campolattaro, Frederick Wang

Research output: Contribution to journalArticlepeer-review

8 Scopus citations

Abstract

Purpose: To compare measurements of eccentric fixation using two different targets for fixation, a traditional visuoscope target and the streak target of an ophthalmoscope. Patients and Methods: Monocular fixation was evaluated using visuoscopy in 47 patients ranging in age from 4 months to 22 years. Visuoscopy measurements were compared using both the traditional visuoscope target and the streak target of a Welch Allyn ophthalmoscope. The streak light was rotated both horizontally and vertically to detect both horizontal and vertical eccentric fixation. Results: The streak target improved testability of eccentric fixation in children younger than 3 years compared to the traditional visuoscope target (75% versus 30%). All of the patients older than 3 years were testable using both targets, with both methods yielding the same results. All of the patients with a visual acuity of at least 20/20 also demonstrated central fixation using both techniques. Conclusions: Using the streak of a Welch Allyn ophthalmoscope as a visuoscope target allows for testing of eccentric fixation in children younger than 3 years.

Original languageEnglish
Pages (from-to)89-96
Number of pages8
JournalJournal of Pediatric Ophthalmology and Strabismus
Volume42
Issue number2
StatePublished - Mar 2005
Externally publishedYes

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