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Available with or without handle to allow for unobstructed, 360 degree rotation.
Raised ridge prevents prism edges from touching table.
* Allow accurate testing of large oculomotor imbalances in the trial frame.Fresnel trial sets are indispensable as a tool for the proper evaluation of ocular motility disturbances.
These acrylic prisms allow for a more accurate  evaluation of large-angle deviations.
Because a rigid Fresnel prism reduces vision less and  creates less distortion and aberration than the press-on  prism of a corresponding power, the practitioner can  more accurately determine the tolerance to a given  press-on.
The patient who is not able to tolerate a prism from the trial set due to its side effects would not be a good  candidate for a Fresnel press-on prism
Ships within 48 hours · Estimated delivery Jul 11 - Jul 16
US$40
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