The Use of “Half Patch” Occlusion

Melinda Hansor

Most orthoptists are familiar with the use of occlusion of part of a lens in cases of paralytic squints, i.e. in occluding the area in which diplopia is experienced, thus allowing binocular vision in other directions of conjugate gaze. Also, in cases where hypertropia is manifest in depression only, suppression of the hypertropic eye is prevented by occluding the lower half of the other lens.