A technique used to detect dense suppression and determine retinal correspondence. It is the most dissociating evaluation for abnormal retinal correspondence. It also directly ascertains the direction of the deviating eye's fovea. The assessment is useful for adult patients that can precisely fixate monocularly and those with eccentric fixation. It is also helpful for checking on adults pre-operatively, particularly those with a long-standing intermittent exotropia. The technique may not be helpful for children.
