A REDDIT user has re-posted a popular optical illusion on the social media site and asked other users for advice.
The vision-bending image was posted to the r/opticalillusions Reddit thread.
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Reddit user Jon_Starkgaryen wrote: “I looked at this for a long time, crossed my eyes and focussed a lot and now my vision has been awful for a year and a half.
“I’ve been to an optician and an opthalmologist, both can’t find anything wrong.
“My actual vision is good but it’s like I’ve got this burned in front of everything that I see.
“Has anyone ever experienced anything similar and have any possible treatments because it’s driving me crazy.”
The illusion looks pretty simple at first glance, it’s just made up of grey bricks and green lines.
If you look closer, you’ll notice some of the lines seem to curve before returning to looking straight.
A line above the grey squares reads: “Go ahead, find the curved line.”
That is much more difficult than it sounds.
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There seems to be no way to ‘solve’ the puzzle no matter how you look at it.
This illusion relies on the strategic placement of colors and shapes to trick your brain into seeing curves that aren’t there.
Illusion lover Michael Bach offered an explanation on his blog.
He wrote: “This brilliant design is from illustrator Lesha Porche (USA). When it appeared, it quickly made the rounds, and I thank Jeremy Hinton of “Lilac Chaser” fame to alert me.
“My explanation is as follows: “The tiles contain a low-resolution brightness curve, which is masked by all the borders.
“It can be made more apparent by applying a little blur (4–5). The blur occurs automatically in our visual system, because –largely unnoticed– our visual resolution rapidly falls off from the center of gaze: at 10° eccentricity our visual acuity is 1/10th of the central one.
“However, the periphery does not “feel” blurred, does it? Its sharpness is “invented” by our visual system, just as our blind spots are “filled in”.
Bach’s theory suggests the lines in the illusion aren’t actually curved in the way your brain is telling you.
Fans of the optical illusion praised it on the recent Recent post.
One wrote: “This is by far the best optical illusion I’ve seen on Reddit. It’s amazing how easily your mind infers stuff from your peripheral vision.”
Another said: “Yeah no it just looks curvy, just look at once singular line and follow it, should be straight.”
