Successful Rehabilitation of a Homonymous Hemianopia Patient with Binocular Ground-in Sectorial Prisms: Considerations concerning Prism Power and Location

Abstract

A case describing the successful rehabilitation of a patient with a right homonymous hemianopia field loss is presented. The patient was fitted with binocular 20-dioptre ground-in sectorial prisms, following a 2-month trial with Fresnel paste-on prisms. Successful fitting of binocular sectorial prisms was achieved through adjustment of prism power and location to ensure smooth transition between both hemifields of view and to avoid diplopia in primary gaze. Prism power was obtained through empirical calculation based on distance and near prism power requirements, as determined with trial lens prisms, which also allowed for determination of the best prism location.

Keywords::

• hemianopia
• low vision
• prism adaptation
• rehabilitation
• visual field

Declaration of interest: The authors report no conflicts of interest. The authors alone are responsible for the content and writing of the paper.