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. Author manuscript; available in PMC: 2017 Jun 1.
Published in final edited form as: Ophthalmology. 2016 Mar 13;123(6):1222–1231. doi: 10.1016/j.ophtha.2016.02.016

Fig. 8.

Fig. 8

Orbit 1.8® computational simulation in unilateral and bilateral superior oblique (SO) palsy. Hess screen charts shows the binocular alignment predicted from measured rectus pulley displacements alone (A, B), and combined with right SO weakness in unilateral (C) and bilateral weakness in bilateral SO palsy (D). SO weakness was simulated by reducing contractility to 0% and elastic strength to 50% of normal.