This is topic Optical Illusions in forum Film-Yak at Film-Tech Forum ARCHIVE.
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Posted by Joe Redifer (Member # 3) on 02-25-2002, 09:19 PM:
Here's some cool optical illusions/brain teasers you may or may not have seen yet: 
Awesome! Perhaps Evans can explain why we see what we do.
Posted by Paul G. Thompson (Member # 655) on 02-25-2002, 10:14 PM:
Neat, huh?
Posted by Jeff Skallan (Member # 891) on 02-25-2002, 11:03 PM:
The dot and circles illusion is very similar to the effect I notice while watching anamorphic scope movies. This is most noticeable in scenes when the camera's focus is racked from extreme foreground to infinity background. Weird!
Posted by Paul Mayer (Member # 355) on 02-25-2002, 11:41 PM:
LOL! That horizontal-line one is a video projectionist's nightmare come true. BTW the left brain/right brain one is commonly used as a screening test for airline pilot applicants. Timed, they use it as a measure of an applicant's ability to handle stress. 
Paul
SMPTE Hollywood Section
Unemployed 
mercenary film/video projectionist/engineer
"Otaku wa tsurai yo" <-- Yeah I know, bad pun. Sue me.
It's tough being a fan!
-23
Posted by Bob Maar (Member # 763) on 02-26-2002, 02:51 AM:
Whoa!! I can't stop the room from spinning. Thanks for the treat. 
Posted by Christopher Santapaola (Member # 1015) on 02-27-2002, 08:48 AM:
ahhhhmY hEaD hURtS................. 
dizzy
I love these things.