[Areas of anomalous binocular single vision in small angle concomitant esotropia: evaluation by means of a modification of the v. Graefe technique (author's transl)].

A red filter in front of the fixing eye according to the v. Graefe technique was used in order to detect binocular visual field in patients with anomalous retinal correspondence and small angle esotropia. A striated glass was also placed in front of the deviated eye, in order to check whether single perception was related to suppression or to binocular vision. It has been demonstrated that these patients prevalently enjoy an anomalous binocular vision supported by an anomalous retinal correspondence. The suppression scotoma described by the v. Graefe perimetric technique may therefore in certain cases be in reality areas of single anomalous binocular vision. It has also been seen anomalous retinal correspondence is more deeply rooted at the center than at the periphery of the binocular visual field.