Prisms in clinical practice

Abstract

Prisms are used in diagnosis and Therapy of Ophthalmic disorders. Prismotherapy provides symptomatic relief not only in many kinds of squints, but also in non strabismic conditions like convergence insufficiency, nystagmus, heminopia etc. One of the most important therapeutic skill we have acquire in this direction, is the localisation of such clinical needs and the timely use of the wonderful therapeutic functions of prisms for the relief of such conditions. Thin Fresnel prisms are now more used in clinical practice.

Keywords

• Fresnel prism
• hemianopic spectacles
• prism base
• prism diopter
• vertical diplopia