“…In the oculosympathetic pathway, lesions may be at different levels, such as the cerebral hemisphere, hypothalamus, cervical spinal cord, T1 spinal cord, cervical sympathetic chain, and carotid plexus. Clinically, it is characterized by myosis, ptosis, enophthalmos, loss of sweating on the same side of the face, a temporary reduction in the intraocular pressure, increased accommodation amplitude, and changes in tear viscosity (3)(4)(5)12). Common causes are tumors in the lung apex, aortic dissection, carotid artery dissection, traumas in the neck region, local anesthetic injection to the IJV area and deep tissue, and epidural anesthesia (4,12).…”