Glasses used to determine a pseudofovea’s direction, suppression, abnormal retinal correspondence (ARC), and the presence of periphery-sensory fusion in patients with eye deviations. The glasses are least dissociating because they simulate life-like testing conditions. Because the lenses don't dissociate the eyes, they cause light points to be viewed as streaks. Due to their mildly dissociating nature, the lenses can detect small ARC in large-angle strabismus.