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Findings on examination of the binocular correspondence often differ, depending on the methods employed. The authors looked for correspondence in cases of esotropia or manifest exotropia, measured bifoveolarly, foveo-peripherally and between two peripheral locations. Examination with the phase-difference haploscope revealed a tendency to harmonious anomalous correspondence at the periphery of the visual field; this was different from the bifoveal location, which remained unharmonious even when additional fusion stimuli seen by both eyes were given. In contrast to this result the correspondence of foveolae and periphery were found to be equal in cases of primary microstrabism.