Retinal correspondence under dynamic background.

We examined the binocular vision of 14 patients with esotropia under a dynamic background. The objective and subjective angles of the patients were measured using a phase difference haploscope under three conditions: no background (A), a static background produced by an image slide (B), and a dynamic background produced by 8-mm movies (C). The objective angle remained the same under different backgrounds. On the other hand, the subjective angle tended to become 0 degree under condition C; that is, more harmonious abnormal retinal correspondence (HARC) was obtained under C. Therefore, it was concluded that HARC was more easily detected under the dynamic background than under the static or no background conditions.