Prisms: a love/hate relationship?

This CET Video describes how professional perceptions of the value of prisms to treat defects of binocular vision can differ. When are they a lifeline or an unnecessary crutch? Professor Anna Horwood, an experienced orthoptist, will cover prism therapy in various binocular vision anomalies. There is a surprisingly weak evidence base for their value, efficacy and long-term outcomes, despite them being a mainstream treatment with undoubted value

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