[ETL]

But surely their brain generates images of some sort in their minds while thinking and sleeping.

[huldah1776]

here’s 2 videos for ya. A blind man answering your question and the images they recorded during sleep..

https://www.youtube.com/watch?v=XpUW9pm9wxs

http://gizmodo.com/5843117/scientists-reconstruct-video-clips-from-brain-activity