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[Variations in Posner's test for diagnosis of dissociated strabismus]
José Manuel González-González1, María Estela Arroyo-Yllanes2, José Fernando Pérez-Pérez1
1Clínica de Oftalmología Pediátrica y Estrabismo. Servicio de Oftalmología. Hospital General de México, O.D., Mexico.
Background:
A particular feature of dissociated strabismus is that the frequency of presentation and its magnitude is variable. It is common to find that in certain examinations is very obvious, and in others not so much. To facilitate exploration some maneuvers are described: Bielchowsky's maneuver, Bielchowsky's phenomenon and Posner test.
Objective:
to compare the presence and magnitude of the ocular movement in dissociated strabismus in Posner's Test using opaque versus translucent occluders.
Methods:
Prospective, transversal, descriptive study. Patients with diagnosis of were included. Posner's test in two ways: 1) With opaque occluders, and 2) with translucent occluders was perforned.
Results:
Ninety-five percent of the patients presented horizontal deviation. Posner's test with opaque occluder was positive in all cases (100%). Posner's test with translucent occluders was positive in 94% of the patients (p= 8). The magnitude of the ocular movement was significantly smaller using translucent occluders than opaque occluders. (p= 0.0001).
Conclusions:
The Posner's test using opaque occluders was more efective to demonstrate clearly and precisely the size of the ocular movement in dissociated strabismus.
