The ancient Indian yoga text, Hatha Yoga Pradipika, describes six cleansing techniques. The objective of cleansing techniques is to purify and prepare the body for the practice of yoga postures, breath regulation, and meditation. Yogic visual concentration technique (trataka) is one of these techniques. A previous study showed an increase in cognitive performance following yogic visual concentration (trataka). The present study is comparative in nature. Experimental and Control group were divided randomly with 12 students in each group. Performance on the Span of Attention equipment (Tachistoscope) and meaning and non meaningful cards was assessed in healthy volunteers with ages ranging from 20 years to 35 years. The participants of both groups were pre tested and post tested after 3 weeks of intervention.