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The left eye is higher in this girl, an example of hypertropia, a vertical deviation © ORBIS
Director, E.H.M., Telemedicine, O., Sight, C.-, International, O., Ave, 520 th 8 and York, N. (no date) Understanding, detecting and managing strabismus. Available at: http://www.cehjournal.org/article/understanding-detecting-and-managing-strabismus/ (Accessed: 10 December 2016)