Dismiss Notice
Join Physics Forums Today!
The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

Does anyone else like optical illusions?

  1. Oct 30, 2011 #1

    Dembadon

    User Avatar
    Gold Member

    http://www.michaelbach.de/ot/

    I just spent the last 45 minutes looking at some of the demonstrations on that site. Apart from sore eyes and a minor headache, I find it fascinating. Most of the demonstrations allow you to manipulate sliders to adjust different aspects of the illusion. Some of them seemed bogus: telling me things were or weren't moving when I swore otherwise. I wouldn't know how to go about proving any shenanigans, though.

    Anyway, does anyone else like optical illusions? If so, what are some of your favorites?
     
    Last edited by a moderator: Oct 30, 2011
  2. jcsd
  3. Oct 30, 2011 #2
    Re: Optical Illusions

    Good catch.
    I have seen a lot of them previously.

    The new ones for me were the blurring ie the angry face and the Lincoln pictures.
    Never used to understand what squinting ever did for sight improvement - now I know.
     
  4. Oct 30, 2011 #3

    Dembadon

    User Avatar
    Gold Member

    Re: Optical Illusions

    I'd only seen a few of them before. One of my favorites was the "Breathing Square." It looked like the square was getting bigger, but that's only because our initial view is limited by the slits.
     
  5. Oct 30, 2011 #4

    Andy Resnick

    User Avatar
    Science Advisor
    Education Advisor
    2016 Award

    Re: Optical Illusions

    Here's another page:

    http://www.ritsumei.ac.jp/~akitaoka/index-e.html
     
  6. Oct 31, 2011 #5

    Dembadon

    User Avatar
    Gold Member

  7. Oct 31, 2011 #6
    Is there a measure of how effective an optical illusion is?
     
  8. Nov 1, 2011 #7

    FlexGunship

    User Avatar
    Gold Member

    Yes, it's called the "dude, come look at this" and it's units are "WTF?"
     
  9. Nov 1, 2011 #8

    Pythagorean

    User Avatar
    Gold Member

    You can certainly measure the effect on the individual compared to other individuals within a single illusion (http://ripplestat.com/dnlds/task_directions/ml_directions.pdf" [Broken]) given that that some properties of the illusion can be quantified.

    If you were to do this with several different illusions, you might be able to see which illusion fooled more people in a given sample, but I don't think there's some standard measure established; External validity is a huge problem with this complex of a system. Mapping mind to brain is one of the big projects going on in the scientific community right now, so there could very well be some paper/s on your very question for all I know. There's lots of papers (some very speculative) on the subject of subjectiveness.
     
    Last edited by a moderator: May 5, 2017
  10. Nov 1, 2011 #9

    Pythagorean

    User Avatar
    Gold Member

    https://www.youtube.com/watch?v=Ttd0YjXF0no
     
  11. Nov 1, 2011 #10

    Evo

    User Avatar

    Staff: Mentor

    I loved the "magic eye" books.

    Here is one. Just touch your nose to the screen and slowly pull away without focusing, once you see the 3D image, you can focus on it. Doing it on the computer is so much easier than the book!

    http://www.magiceye.com/
     
  12. Nov 2, 2011 #11

    Dembadon

    User Avatar
    Gold Member

    I like them as well. I was never able to get it to work with the method you mention, though. The only way is works for me is to "defocus" my eyes and kind-of stare through the page for a few seconds. When I refocus them, I can usually see the embedded image. Putting my nose on the page and pulling it away never really worked as well, even though the focus/defocus component is the same for each.
     
    Last edited: Nov 2, 2011
  13. Nov 2, 2011 #12
    Magic-eye is better than drugs.
     
  14. Nov 3, 2011 #13
Know someone interested in this topic? Share this thread via Reddit, Google+, Twitter, or Facebook




Similar Discussions: Does anyone else like optical illusions?
Loading...