 Interventions may be aimed at the individual impairments that reduce mobility or at the level of disability.This second level intervention includes provision, education, and instruction in the use of equipment such as walking aids, wheelchairs, motorized scooters and car adaptations as well as instruction on compensatory strategies to accomplish an activity — for example undertaking safe transfers by pivoting in a flexed posture rather than standing up and stepping around.Up to 50% of patients with MS will develop an episode of optic neuritis and 20% of the time optic neuritis is the presenting sign of MS.