Things That Look Like Other Things. Also known as pareidolia, it's the phenomenon in which our brains perceive familiar things (especially faces and human forms) in random places. See also The Pareidolia Museum and the Flickr pareidolia pool. [Previous pareidolia-related threads here]
posted by amyms on Mar 28, 2008 - 40 comments

Seeing, Hearing and Smelling the World. From the main page, click on the various articles to access a larger left-side menu, with articles including Illusions Reveal The Brain's Assumptions, A Hot Spot in the Brain's Motion Pathway, The Value of Having Two Ears, The Memory of Smells and much more.
posted by amyms on Dec 5, 2007 - 2 comments

'Twas blind, but now I see? — Virgil surgically regained his sight after nearly 50 years of blindness: "On the day he returned home after the bandages were removed, his house and its contents were unintelligible to him, and he had to be led up the garden path, led through the house, led into each room, and introduced to each chair." In the end, he and others like him [PDF] would have rather stayed in the Country of the Blind. (A happier ending was the more recent case of Mike Mays, previously posted here.)
posted by cenoxo on Jun 17, 2006 - 19 comments

The Origin of Art in Entoptic Phenomena Relatively recent research suggests cave art is neither simply 'art for art's sake' nor 'hunting magic', rather a representation of entoptic phenomena associated with hallucinations during altered or trance states of consciousness. These images are common to modern and prehistoric humans all over the world, and can be readily found in contemporary art. (see also some further reading, cool entoptic Kutie Catcher, AskMe)
posted by MetaMonkey on Jan 29, 2006 - 13 comments

love
posted by kafziel on Apr 29, 2005 - 18 comments

Laser-o-vision: A system that projects light beams directly into the eye could change the way we see the world.
posted by moonbird on Apr 27, 2004 - 18 comments

Seeing with sound.
A researcher in the Netherlands has developed a system that converts pictures from a head-mounted camera into highly complex soundscapes, which are then piped to the user via headphones. After only a week of use, a woman who has been blind from birth can tell a CD from a floppy, and discern whether the lights are on or off. Not quite up to either a bat and/or Daredevil standards, but very cool nonetheless.
posted by Irontom on Oct 14, 2003 - 5 comments

The gift of sight is easy to take for granted. Not for Mike May, blinded in infancy, Mike had partial vision restored at the age of 43. This is his journal, written with infectious delight for his new gift and documenting the unexpected problems that the miracle brings. There's much, much more to vision than just the data and Mike is an unprecedented opportunity to better understand how perception works. [via the Guardian and previously mentioned here]
posted by grahamwell on Aug 26, 2003 - 14 comments

A set of 24 colour blindness tests I picked up this link from the comments in another forum, somebody mentioned they were colour blind and provided a link to these tests. Interestingly the colour blind can also see stuff that normally sighted people can't. [more inside]
posted by substrate on Mar 6, 2003 - 40 comments

Re-Shape Your Eyes While You Sleep? Wow - I don't know about you, but if I could wear contacts during my sleep that I *took out* when I woke up and didn't have to wear any all day, and I could see, then I'd do it in a second. When will it become reasonably priced?
posted by djspicerack on Sep 26, 2002 - 25 comments

Virtual light - "...the wires plug into Patient Alpha's head like a pair of headphones plug into a stereo. The actual connection is metallic and circular, like a common washer. So seamless is the integration that the skin appears to simply stop being skin and start being steel." Cameras that jack into a blind man's brain, allowing him to 'see' may soon be here.
posted by GriffX on Aug 14, 2002 - 23 comments

Does this explain ghosts and 'divine' visions? Charles Bonnet Syndrome is a degenerative sight disorder that plunges sufferers into a surreal world of hallucinations and visual distortions. Can it help us to explain many cases of 'divine' visions, ghost-sightings, UFOs and other other-worldly phenomena? (requires registration 4 main link)
posted by RokkitNite on Apr 8, 2002 - 22 comments