What Does “Legally Blind” Actually Mean?It’s a common misconception that being legally blind means having no vision at all—but that’s not the case. In the United States, legal blindness is defined in two ways: 1. Visual Acuity: 20/200 or worse in the better-seeing eye with best correction (such as glasses or contact lenses). 2. Visual Field: A field of vision of 20 degrees or less in the better-seeing eye (also known as tunnel vision).Someone may still see light, shapes, or even large print, and

How to challenge your visual perception. | Big Think