chiastopic fusion

Also known as cross-fixation fusion, chiastopic fusion is a type of binocular fusion where each eye fixates on a separate target, with the right eye fixating on the left target and the left eye fixating on the right target. This is achieved by voluntarily converging the eyes to align the visual axes on the respective targets. Chiastopic fusion is not a normal viewing condition and is typically used in vision therapy to improve binocular function and reduce suppression.