If one visual cortex is damaged, optokinetic nystagmus will be lost when objects move toward the side of the cortex lesion (that is, if they approach an individual from the side of vision impairment).
90-Year-Old Activist 'Granny D' Inspires Change, Walks Across Country. I learned a few very good things during my travels with Doris Granny D Haddock. The first, which sounds hackneyed, is that one person can make a difference. It's truer than I imagined.
Activism is an engaged citizenry. Some activists try to persuade people to change their behavior directly, rather than to persuade governments to change or not to change laws. Other activists try to persuade people to remain the same, in an effort to counter change.