The upward rotation of one eye. SYN: sursumduction.
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su·pra·duc·tion (soo″prə-dukґshən) [supra- + L. duction] 1. the upward rotation of an eye around its horizontal axis. 2. the upward rotation of one eye independent of the other by a basedown prism in testing for vertical divergence. See also sursumversion. Called also superduction, sursumduction, supravergence, and sursumvergence.Medical dictionary. 2011.