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.
Astigmatism is a common eye problem causing blurry vision, difficulty seeing details and eye strain headaches. Ocular migraine usually refers to a type of migraine that can cause temporary blindness in one eye. Retinal detachment causes floaters in your vision, flashes of light, blind spots, loss of vision, and more. A stroke occurs when blood and oxygen to the brain are cut off, and causes numbness, confusion, and more.