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Ophthalmic prisms are used for correcting many ocular conditions such as strabismus, diplopia (double vision), hemianopia and visual spatial neglect.
For prism powers of more than 12PD, flexible membrane press-on Fresnel prisms are commonly used but they offer poor optical quality for prism powers of 15PD or more1.
Paltz Associates, Inc. offers practical alternatives to press-on Fresnel prisms with better optical quality.
For low prism powers:
An alternative to Fresnel press-on prisms. Precision molded to reduce multiple images, image washout and scattering.
Available in:
10 - 40 PD, 57 PD
For high prism powers:
Corrects for factors that introduce aberrations in high power prisms. Improves optical quality and contrast sensitivity.
Available in:
25 PD or greater.
Rigid Fresnel Prisms and ComPrisms® are available in the following forms:
Rigid Fresnel Prisms and ComPrisms® are available in the following forms:
Clip-Ons
Flip-Ups
Prism Training Goggles
Trial Lenses
For diagnostic purposes.
Clip on to matching spectacle frame.
Clip on to spectacles; flip up when not needed.
Used for vision training.
Ref 1. - Cheng D., Woo GC, Wu, Ophthalm. Physiol. Opt. 2001, 21, 312-6
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