The reversed fixation test: a diagnostic test for dissociated horizontal deviation.
BACKGROUND
Dissociated horizontal deviation is one of several conditions that manifest unequal horizontal deviations depending on which of the 2 eyes is fixating.


OBJECTIVE
To describe the reversed fixation test as an essential tool to establish the diagnosis of dissociated horizontal deviation.


METHODS
Analysis of 4 case scenarios depicting the utility of the reversed fixation test.


RESULTS
The reversed fixation test distinguishes dissociated horizontal deviation from an unequal exodeviation of the 2 eyes resulting from postoperative slippage or weakness of a horizontal rectus muscle.


CONCLUSIONS
The reversed fixation test is necessary to establish the diagnosis of dissociated horizontal deviation.
Brodsky
Michael C
MC
Departments of Ophthalmology and Pediatrics, University of Arkansas for Medical Sciences, Arkansas Children's Hospital, 800 Marshall, Little Rock, AR 72202, USA. brodskymichaelc@uams.edu
Gräf
Michael H
MH
Kommerell
Guntram
G
D003941:Diagnostic Techniques, Ophthalmological; D005099:Exotropia / Q000175:diagnosis*; D005133:Eye Movements; D005403:Fixation, Ocular; D006801:Humans; D009801:Oculomotor Muscles / Q000473:pathology*; D015348:Vision, Binocular