Simply because you do not remember your a dream does not mean that you did not dream. Dreams are indispensable. A lack of dream activity can mean protein deficiency or a personality disorder. We dream on average of one or two hours every night. And we often even have 4-7 dreams in one night.
Blind people do dream.
Although their dreams may not consist of vivid images, blind people can clearly recall and describe the sounds they hear or the textures they come in contact with in their dream. Their hearing and tactility are hyper-sensitive. Five minutes after the end of the dream, half the content is forgotten. Men tend to dream more about other men, while women dream equally about men and women. Studies have shown that our brain waves are more active when we are dreaming than when we are awake.