From:	SHADE <MFN6430@*****.TAMU.EDU>
Subject:	ultrasound eyes
Date:	Mon, 9 Aug 1993 11:45:22 -0500

Seeing in the thermographic range is a lot easier to explain than seeing
in the ultrasound range. Thermographic is only moving sight three or four
shades into the ir spectrum which is right below red light. Ultra sound is a
lot farther down the spectrum. Also you would drastically have to change the
shape of the eye to send out and then recieve the ultrasound signal. Things in
and of themselves do not give off a lot of ultrasound, and there is not a lot of
it floating around like light. Walking into a room with motion detectors will
also effectively "blind" the person because of the ultrasound comming from the
sensors. Now hooking up ultrasound ears and then converting it to a picture
would probably work pretty well, as someone suggested. Someone also mentioned
that low light eyes are not natural to the human visual center. Why is adding
more cones and rods to the eyes going to be that much harder to interpret than
anything else, just make the eyes dialate more. More comments please.
SHADE