Diplopia is the subjective complaint of seeing 2 images instead of one and is often referred to as double-vision in lay parlance. Diplopia is often the first manifestation of many systemic disorders, especially muscular or neurologic processes.
A clear and comprehensive history is the single most useful evaluation in treating patients with diplopia. The patient typically presents with a history of double vision, where single objects appear as double.
Patching one eye: Patching is often required, since the patient has to continue functioning while awaiting resolution or intervention.
Stick-on occlusive lenses can be applied to glasses to minimize the cosmetic handicap of a patched eye, while sufficiently blurring the one eye to minimize disabling double vision.
Fresnel prisms: These prisms can be stuck to glasses. Although these prisms are only appropriate if a stable deviation is present across all directions of gaze, they severely blur the image from that eye and function in many ways like an occlusive lens.