A condition where only the non-strabismic eye can maintain fixation while both eyes are open. The deviated eye is typically suppressed to avoid diplopia. In young children, constant unilateral strabismus is amblyopiagenic if left untreated.
unilateral cover test
The unilateral (cover-uncover) cover test is an objective method used to determine the presence of a strabismus and differentiate it from a heterophoria. One eye is covered with an opaque occluder while the patient fixates on a target. The uncovered eye is observed for movement during the cover phase, indicating a manifest deviation. If movement is not observed from either eye, move on to the alternate cover test to quantify any heterophoria.
unilateral strabismus
A condition where only the non-strabismic eye can maintain fixation while both eyes are open. The deviated eye is typically suppressed to avoid diplopia. In young children, constant unilateral strabismus is amblyopiagenic if left untreated.