CRP and anterior ischemic optic neuropathy: AION – anterior ischemic optic neuropathy in an ophthalmological examination, BMI – body mass index, CRP – C-reactive protein, CT – computed tomography, ESR – erythrocyte sedimentation rate, FDG-PET – fluorodeoxyglucose positron emission tomography-computed tomography, n – number, TA – temporal artery, US – ultrasound.