Evaluating the role of neuromuscular ultrasound in optic nerve involvement in systemic lupus patients.by measuring the diameter of optic nerve at certain site and comparing it to healthy subjects measurements and to asses NMUS ability to detect optic neuropathy in lupus patients in comparison to conventional techniques including opthalmologist evaluation and visual evoked potential
assessing the role of neuromuscular ultrasound in optic nerve involvement in systemic lupus patients.