Vision: How It Works and Visual Acuity - Cleveland Clinic What is vision? Vision is the process where your eyes and brain work together and use light reflecting off things around you to create the ability to see It’s one of the five main senses and a key contributor to how most people understand the world around them
The Senses: Vision - Dana Foundation The sense organ for vision is an exquisitely evolved biological instrument for turning light into the brain’s language of electrical signals The eye is roughly spherical and about an inch in diameter
Vision 101 - The Vision Council Foundation - Vision Health, Eyewear . . . 20 20 vision: An eyechart measures ‘visual acuity’ or the sharpness of ones vision A person with 20 20 vision can see what an ‘a normally sighted’ individual can see when standing 20 feet away The top number is the distance in feet from the eyechart