Blindness is a broad term used to describe a wide array of visual limitations. Those who are blind see nothing at all. However, in some cases they might be able to experience flashes or flickering images of light and color.
The definition of legal blindness is falling short of a statutory standard of visual acuity. In the United States, it is 20/200. Totally visually impaired people have NLP, otherwise known as No Light of Perception. The functionally blind can see a little, comparably with those who have partial vision loss, which can vary from nothing to distorted images.
An individual who suffers from blindness due to cataracts struggles to see shapes but can recognize cloudy or fuzzy images. People who experience vision loss later in life may experience Charles Bonnet Syndrome. Those with the condition experience a type of non-psychotic hallucination and see things that are not real.
Some visually impaired people can see in their dreams. People who go blind after the age of five may experience visual imagery in their dreams; however, the frequency and clarity diminishes over time. Those with visual impairment since birth may not experience images in their dreams. Their experiences relate to sounds, touches, tastes and smells, and these experiences are often more abstract.