Video 35 Patient with trauma-induced right third nerve palsy manifested by ptosis and ophthalmoparesis and controlateral kinetic/postural tremor and ataxia (Benedict's syndrome)
Video 36 Left oculomotor (IIIrd) nerve palsy with pupillary sparing
Complete ptosis; the patient is unable to fully adduct left eye on right lateral gaze; then fixates with left eye, causing right eye to abduct (Hering’s law); normal abduction with left eye but limited elevation. Pupils equal.
Video 37 Unilateral ptosis due to myasthenia gravis
Ptosis increases with sustained upward gaze and improves after a brief rest.
Video 38 Marked left ptosis, bilateral ophthalmoplegia and weakness of orbicularis oculi in Kearns–Sayre syndrome
Video 39 Ocular myasthenia gravis
Ptosis and divergent squint; on sustained upward gaze, the ptosis increases; later the ptosis is abolished by injection of edrophonium.