This test detects aquaporin 4 antibodies, which are associated with neuromyelitis optica, a rare autoimmune disorder affecting the optic nerves and spinal cord. Blood is collected and analysed to diagnose and monitor the condition. Early detection allows healthcare providers to implement immunosuppressive therapy, prevent relapses, and manage symptoms. Understanding antibody status helps patients reduce neurological damage, maintain mobility, and improve quality of life through tailored treatment and monitoring.