In most cases the blind can still see bright lights, they could dream of a light show. And the possibility if they can see the energy fields; that are blind to us? dimensional states.
people who are blind from birth have no visuals while dreaming. they experience dreams in sound and emotion.
My husband is legally blind. He is missing the left half of vision in each eye. His actual eyes are 20/20 but his brain is the problem. Anyway, to the point...he lost his vision at age 40. He still dreams in full vision. It has been 19 months since he lost his vision.