A simple yet precise method for determining which is an individual's controlling eye.
Tests eyes together and separately (with occlusion). The controlling eye will score better on the binocular part of the test. The non-controlling eye will show greater gain when the controlling eye is occluded.
Uses one target - the patient identifies the position of a dot in one of three diamonds.
Provides Snellen equivalent values of 20/100 to 20/15