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. 2016 Aug 11;14(4):3145–3151. doi: 10.3892/mmr.2016.5624

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Copyright: © Chen et al.

This is an open access article distributed under the terms of the Creative Commons Attribution-NonCommercial-NoDerivs License, which permits use and distribution in any medium, provided the original work is properly cited, the use is non-commercial and no modifications or adaptations are made.

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Range of extraocular movement and position of the eyes in the primary position of the patients in the two families. Extraocular movement was rated on a scale of 0–4, with 0 indicating no movement in that direction and 4 indicating normal movement in that direction. The grey dot indicates the position of the pupil within the orbit in primary gaze. SR, superior rectus; IR, inferior rectus; LR, lateral rectus; MR, medial rectus; SO, superior oblique; IO, inferior oblique; OD, oculus dexter (the right eye); OS, oculus sinister (the left eye).