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Diplopia -
Prism Therapy
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Lecture 5 of 7 NEXT»
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Prism therapy can be useful in the short term as well as the long term as a remedy for diplopia. Fresnel press-on membrane prisms can be applied in the office for temporary relief of diplopia. Prism therapy is also useful in cases of diplopia in which the angle is changing and when the diplopia is thought to be only temporary. In general, prism therapy, either temporary or permanent, is limited to 10 prism diopters per eye. With Fresnel prisms, vision is reduced as prism power goes up. With permanent prisms, weight and unsightliness increase as the power of the prism goes up. There is no effective prismatic treatment for torsional diplopla or uniformly for incomitant strabismus.
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