Documenta Ophthalmologica

, Volume 71, Issue 1, pp 1-18

First online:

Suppression scotomas in primary microstrabismus — a perimetric artefact

  • Ekkehard MehdornAffiliated withDepartment of Ophthalmology, Medical University of Lübeck

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Static perimetry with stereoscopic targets, “stereo-perimetry”, was performed on eight patients with primary microstrabismus to find out how strabismic subjects see under natural conditions, i.e. how they ordinarily make use of their squinting eye. In all cases, suppression scotomas were detectable using dissociating perimetric techniques. By means of stereoperimetry, however, the scotomas were not detectable. On the contrary, stereo-acuity was always best in the center of the suppression scotomas. This result indicates that suppression scotomas of the microstrabismic subjects examined here represented perimetric artefacts. In microstrabismic pateints, the cooperation of the deviated eye in the central visual field is probably much better than has previously been thought.

Key words

anomalous retinal correspondence binocular perimetry microstrabismus stereopsis suppression scotoma