Visual Illusions for May

Well a good dose of visual illusions is important to get about every 5-6 weeks (where did I hear that??). Why? Eye exercise? Wonderous though development? Ummm…maybe they’re just fun?! Well, in any case, here’s the latest installment of visual trickery…enjoy!

 

Hermann Grid and the Grey Blobs

This illusions is courtesy of list25.com

This illusions is courtesy of list25.com

Named after Ludimar Hermann, who first noted this illusion in 1870, you will see that at each white line intersection point our eyes perceive a grey, shadowed blob. That said, these blobs disappear if you try to focus on one of them. Interesting…

 

The Troxler Effect

Image Courtesy: list25.com

Image Courtesy: list25.com

This illusion is quite interesting indeed. If you stare at the above, faded image for about 30 seconds…without moving your eyes…you will see that the image gradually disappears. This is known as “Troxler’s Effect,” which basically says that if you fixate your eyes on a specific point, elements near that point will gradually fade. Wish I could do that to my belly!!! ;).

 

The Jastrow Illusion

Image Courtesy: list25.com

Image Courtesy: list25.com

Getting its name from Robert Jastrow in 1889, this visual illusion explores size and adjacency. Which looks larger? I’m guessing you say “B” looks larger…but in fact it is the same as “A.” This illusion occurs because the shorter edge of “A” is adjacent (directly) to the longer side of “B.” Tricky!

Enjoy!!!



Dan Meyers