piece of writing, written material, writing - the work of a writer; anything expressed in letters of the alphabet (especially when considered from the point of view of style and effect); the writing in her novels is excellent; that editorial was a fine piece of writing.
The Senses. Researchers have studied vision more thoroughly than the other senses. Because people need sight to perform most daily activities, the sense of sight has evolved to be highly sophisticated. Vision, however, would not exist without the presence of light. Light is electromagnetic radiation that travels in the form of waves. Light is emitted from the sun, stars, fire, and lightbulbs. Most other objects just reflect light. People experience light as having three features: color, brightness, and saturation.
However, 90 percent of legally blind people can see something, even if just light. Those who can see only light are often light-sensitive and bright light can cause pain. If they can't see much beyond light, they will rarely have a warning when bright light is coming. So, dark glasses are a real necessity. And then there are the rest of us, i.e. most people who are legally blind who can actually see some but not much. We often wear glasses in order to improve our vision.