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Prism Glasses Expand the View for Patients with Hemianopia
Date:5/12/2008

ted a permanent version of the prisms with higher optical quality and better durability than the temporary prisms that were fitted at the start of the study. These permanent prisms were provided to 15 of the study patients when they became available.

A new, higher power, version of the permanent prism glasses recently developed by Chadwick Optical should also further expand the visual field and be even more beneficial for patients' mobility, according to Peli. The prototype used in the study expanded the peripheral upper and lower visual fields by 20 degrees without obstructing central vision. The new glasses expand the field by 30 degrees.

A larger community-based multi-center study is currently underway to evaluate the latest model. In addition to the higher power, the new study is also evaluating a novel design for which Dr. Peli just received a patient from the US patent office. Details on the new ongoing study are available at http://www.clinicaltrials.gov (clinical trial NCT00494676).

Schepens Eye Research Institute is an affiliate of Harvard Medical School and the largest independent eye research institute in the nation.


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SOURCE Schepens Eye Research Institute
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