Mean values are across left and right lateral rectus, inferior rectus, medial rectus, and superior rectus
BMI body mass index, CPEO chronic external progressive ophthalmoplegia, DM diabetes mellitus, EOM extra-ocular muscle, ET exercise tolerance, KSS Kearns-Sayre syndrome, NA not available, RE right eye, ROEM range of eye movement, SNHL sensorineural hearing loss, SVT supraventricular tachycardia