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A person who is born blind has dreams but doesn't see images. Dreams could include sounds, information, odors, flavors, and feelings. On the other hand, if a person has sight and then loses it, dreams may include images. People who have impaired vision (legally blind) do see in their dreams. The appearance of objects in dreams depends on the type and history of blindness. Mostly, the vision in dreams is to the range of vision the person has had throughout life. For example, someone who has color blindness won't suddenly see new colors while dreaming. A person whose vision degraded over time might dream with the perfect clarity of earlier days or might dream at present . Sighted people who wear corrective lenses have much the same experience. A dream may be perfectly in focus or not. It's all based on experience gathered over time. Someone who is blind yet perceives flashes of light and color from Charles Bonnet syndrome may these experiences into dreams.