P3D Re: blind in one eye

[Dick_Young@xxxxxxxxxxxxxxxxx]

I have been fortunate enough to have tested two one-eyed subjects in my
up-close immersive 3-D
stereo displays (viewing a six foot screen at a distance of 30 inches),
with objects coming forward out of the screen as well as receding.
 One subject, blind in one eye from close to birth, did extremely well at
locating objects, both
locations and sizes, for objects between him and the screen.
The other subject lost vision in one eye about four years before due to an
infection, and did extremely poorly (saw all objects on the screen, with no
pop-out at all).  But, if you take normal people,
let them see the display with two eyes, and then cover one eye, they
continue to see things
in just the same place as if they were looking with two eyes, as revealed
by objective measurements
of where they are seeing things. I have not yet tested taking two-eyed
people, and covering one
eye before they see the stereo display, to see if they still see things
correctly. In short, monocular depth
cues are indeed very powerful. Note: there was not any  motion in any of
these displays -- they were all static.
With depth-from-motion cues as well, monocular displays would be even
closer to binocular.
- Dick Young



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