Study aim: Effects of Activity Based Visual perception Interventions in comparison with Conventional Occupational Therapy Interventions on Occupational Performance and Satisfaction in Performing Daily Activities in People with Multiple Sclerosis Design: Clinical randomized, with two parallel groups Settings and conduct: After approving the research plan and obtaining the code of ethics, we go to Tehran Occupational Therapy Clinics .Written consent is given to patients to complete.inclusion criteria measurement(MMSE, visual acuity, DTVP-A) will be done for patients who accept to be in this project. assessments before and after intervention involve canadian occupational performance, depth perception, visual evoked potential(VEP).intervention group receive visual perception intervention and control group receive occupational therapy for 2 sessions per week, 30 minutes per sessions for four weeks.patients will be followed up one month after intervention. Participants/Inclusion and exclusion criteria: inclusion criteria:age between 18 to 50;at least 3 months after relapse of disease;developmental test of visual perception-adolescent and adult score below 90;mini mental status evaluation above 21;normal sightedness or corrected by assistive devices Non-inclusion criteria:systemic disease diabetes or any disease other than ms; that affects visual system;not cooperating in project Intervention groups: intervention group:visual perception: receive activity based visual perception intervention with 3 dimensional pen in each session patinet should complete 4 stages. control group:conventional occupational therapy: receive interventions include rehabilitation of praxi and motor skills, sensory perceptual skills, emotional regulation, social skills, activities daily of living and assistive device recommendation Main outcome variables: Work performance score in daily activities; depth perception; Path of vision