http://www.quora.com/What-do-blind-people-see-in-their-dreamsDepends if they were born blind or became blind. If they became blind at a later age, they might see images while dreaming, if they were born blind they don't "see" anything.
失明的人的梦境取决于先天/后天失明。如果后天失明的话，他们做梦会看到东西。如果先天失明，根本看不见东西。
An anecdote from a blind by birth person about a nightmare he had:
引用一个先天失明的人讲的噩梦
I was strapped to a chair in a damp room. I couldn't make sense of the room I was in, the echo's were too confusing and ever-changing. Then I hear footsteps, followed by the laughter of a young child. Suddenly someone charges in and kicks one of the legs from under my chair. It quickly vanishes. Then the laughter again, this time I can hear its from a young girl. Its a mocking laugh. Again someone charges in and kicks another leg from under the chair. I start to wobble. I feel water at my feet. It's rising. Another leg from under the chair and more laughter. I don't know where the person is, but I know it's there, looking at me, pointing at me. Finally the last leg is kicked from under the chair and I fall down on the concrete floor. The water is at my mouth and freezing cold, I can't move my body. Just as I am about to drown, I wake up.
我在一个潮湿房间里贝绑到椅子上。我根本无法感受我所在的房间，回音很乱而且经常变。然后我听到脚步声，跟着是一个小孩的笑声。突然，一个人闯进来踢我一个椅子腿。很快就碎了。笑声继续，这回我听到是一个女孩的。嘲笑。又一个人闯进来踢了另一个椅子腿，我开始晃，我感受到脚边有水，正在上升。接着踢另一个椅子腿，和更多的笑声。我不知道这人在哪里，但是我知道他在哪里，看着我，指着我。最终是踢最后一个椅子腿，我摔倒在了水泥地上。水到达了我的嘴的高度，冰冷，我动不了。当我要溺水的时候，我醒了