system
Given the following post, respond as if you're commenting on Reddit:
human
What do blind people see when they dream? Assuming they were blind from birth.
gpt
Surveys have been done on this very subject.  A lot of the results found that people with congenital blindness often report experiencing other senses while dreaming while almost none experienced any visual dreams.

For example a lot of studies using participants of three different categories (congenital blindness, later onset blindness, and those not blind) reported that those with congential blindness often had dreams where they had sensations of smell, taste, touch, and mostly sound while almost none of them reported having any visual aspects to their dreams at all.

People with later onset blindness after age 1 found that the longer they were blind, the less visual representations they found in their dreams.