Leaning Tower Optical Illusion

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	Leaning Tower Optical Illusion

EddieIsSteady

8-23-2009 4:48 PM

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photography

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8-23-2009 4:52 PM

lollipop10

optical delusion

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<div style="margin: 12px 0px; font-family: arial; color: #333333; background: #ffffff; border: solid 4px #e5e5e5; width: 100%; clear: left;"><div class="CM_CTB_Content_Wrap" style="margin: 0px; padding: 0px;background-color:#66ffff;"><div style="border-bottom: solid 1px #dcdcdc; white-space: nowrap; margin-bottom: 8px; background-color: #eeeeee ;background-image: url(http://clipmarks.com/images/source-bg.gif); background-repeat: repeat-x; height: 24px; line-height: 24px; vertical-align: middle; padding-bottom: 4px; color: #666666; font-size: 10px;" ><a href="http://clipmarks.com/clip-to-blog/" title="see clips that are hot right now"><img src="http://content.clipmarks.com/blog_embed/ab338ecd-97f3-4e15-b7c9-9623d119b432/192EE5FB-A385-442A-B982-12C1F810C90E/" alt="" width="19" height="19" border="0" style="vertical-align: middle; margin: 0px 4px; display: inline; border: none; float:none;" /></a>clipped from <a title="http://www.scientificamerican.com/gallery_directory.cfm?photo_id=B5B09611-E7F2-99DF-37B57709D6F8FB20" href="http://www.scientificamerican.com/gallery_directory.cfm?photo_id=B5B09611-E7F2-99DF-37B57709D6F8FB20" style="font-size: 11px;">www.scientificamerican.com</a></div><blockquote style="text-align: left; padding: 0px 8px; margin: 4px 0px 8px 0px; background: transparent; border: none;" cite="http://www.scientificamerican.com/gallery_directory.cfm?photo_id=B5B09611-E7F2-99DF-37B57709D6F8FB20">Year's Best Optical Illusion</blockquote><div style="height: 2px; font-size: 2px; background: #dcdcdc; border-bottom: solid 1px #f5f5f5; margin: 2px 4px;"></div><blockquote style="text-align: left; padding: 0px 8px; margin: 4px 0px 8px 0px; background: transparent; border: none;" cite="http://www.scientificamerican.com/gallery_directory.cfm?photo_id=B5B09611-E7F2-99DF-37B57709D6F8FB20"><IMG width="400" alt="Year's Best Optical Illusion" src="http://www.scientificamerican.com/media/img_gallery/B5B09611-E7F2-99DF-37B57709D6F8FB20.jpg" />
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						FREDERICK A A KINGDOM, ALI YOONESSI AND ELENA GHEORGHIU, <I>McGill Vision Research, Dept. Ophthalmology, McGill University</I></P></DIV></blockquote><div style="height: 2px; font-size: 2px; background: #dcdcdc; border-bottom: solid 1px #f5f5f5; margin: 2px 4px;"></div><blockquote style="text-align: left; padding: 0px 8px; margin: 4px 0px 8px 0px; background: transparent; border: none;" cite="http://www.scientificamerican.com/gallery_directory.cfm?photo_id=B5B09611-E7F2-99DF-37B57709D6F8FB20">No, you have not had one grappa too many. These images of the Leaning Tower are actually identical, but the tower on the right looks more lopsided because the human visual system treats the two images as one scene. Our brains have learned that two tall objects in our view will usually rise at the same angle but converge toward the top—think of standing at the base of neighboring skyscrapers. Because these towers are parallel, they do not converge, so the visual system thinks they must be rising at different angles, as demonstrated by this year's winner of the Best Visual Illusion of the Year Contest, sponsored by the Neural Correlate Society.</blockquote></div><div style="margin: 0px 6px 6px 4px;"><table style="font-size: 11px;border-spacing: 0px;padding: 0px;" cellpadding="0" cellspacing="0" width="100%"><tr><td style="background:transparent;border-width:0px;padding:0px;">&nbsp;</td><td align="right" style="background:transparent;border-width:0px;padding:0px;width:107px" width="107"><a href="http://clipmarks.com/share/192EE5FB-A385-442A-B982-12C1F810C90E/blog/" title="blog or email this clip"><img src="http://content9.clipmarks.com/images/c2b-foot.png" border="0" alt="blog it" width="107" height="17" style="border-width:0px;padding:0px;margin:0px;" /></a></td></tr></table></div></div>

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