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hy·per·tro·pia .hī-pər-'trō-pē-ə n elevation of the line of vision of one eye above that of the other: upward strabismus
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n.
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hy·per·tro·pia (hi″pər-troґpe-ə) [hyper- + trop- + -ia] vertical strabismus in which there is permanent upward deviation of the visual axis of an eye.Medical dictionary. 2011.