{"0": "Optic disc pallor", "1": "Muscle abnormality related to mitochondrial dysfunction", "2": "Mental deterioration", "3": "Mitochondrial myopathy", "4": "Dementia", "5": "Visual field defect", "6": "Visual loss", "7": "Ragged red muscle fibers", "8": "Blindness", "9": "Decreased activity of mitochondrial complex i", "10": "Horizontal nystagmus", "11": "Sensorimotor neuropathy", "12": "Abnormality of hepatobiliary system physiology", "13": "Abnormal mitochondria in muscle tissue", "14": "Corneal opacity", "15": "Abnormality of the mitochondrion", "16": "Proximal tubulopathy", "17": "Abnormality of head blood vessel", "18": "Abnormal brainstem mri signal intensity", "19": "Polyneuropathy", "20": "Optic neuropathy", "21": "Central scotoma", "22": "Hepatic failure", "23": "Abnormality of the vasculature of the eye", "24": "Variable expressivity", "25": "Scotoma", "26": "Abnormal retinal artery morphology", "27": "Progressive visual loss", "28": "Poor head control", "29": "Focal t2 hyperintense brainstem lesion", "30": "Respiratory distress", "31": "Abnormal retinal vascular morphology", "32": "Ventricular hypertrophy", "33": "Hallucinations", "34": "Postural tremor", "35": "Abnormality of pulmonary circulation", "36": "Abnormal activity of mitochondrial respiratory chain", "37": "Paraparesis", "38": "Abnormal tissue metabolite concentration", "39": "Hyperintensity of cerebral white matter on mri", "40": "Abnormal circulating lipid concentration", "41": "Abnormal nephron morphology", "42": "Episodic vomiting", "43": "Phenotypic variability", "44": "Delusions", "45": "Poor eye contact", "46": "Progressive neurologic deterioration", "47": "Abnormal visual electrophysiology", "48": "Frequent falls", "49": "Abnormality of retinal pigmentation"}