Find The Curved Line

2021Optical illusion / image macrosemi-active

Also known as: Curved Line Illusion · Straight Lines Illusion

Find The Curved Line is a 2021 optical illusion image macro meme with a grid of straight green lines on a gray checkerboard that tricks brains into seeing curves.

Find The Curved Line is an optical illusion meme featuring a grid of perfectly straight green lines over a gray checkerboard pattern that tricks the brain into seeing curves. The illusion went viral in December 2021 with the caption "go ahead, find the curved line," racking up tens of thousands of upvotes and shares across Reddit, Facebook, and Instagram within days2. It taps into the brain's pattern recognition glitches, making viewers feel dizzy or confused as they try to reconcile what they see with what's actually there1.

optical illusion memespattern recognition memeschallenge memesviral photo memes

Overview

The image shows a 7x7 checkerboard of gray squares outlined by green lines. The gray squares contain a TV static-like noise pattern. At a quick glance, the green lines look unmistakably curved, almost warping across the grid. But focus on any single line and it snaps back to being perfectly straight2. The trick works because the high-contrast noise pattern between the lines disrupts the brain's edge detection, creating the illusion of curvature where none exists1.

The meme version pairs this image with the challenge "go ahead, find the curved line," daring viewers to locate a curve that isn't there2.

The optical illusion first appeared on the Facebook page Share After Reading on December 11, 2021, reportedly sourced from Reddit's r/blackmagicfuckery, though the original subreddit post appears to have been deleted2. On the same day, u/Low-Volume-8358 posted it to r/HolUp, where it picked up over 61,000 upvotes in three days2.

A top comment on the r/HolUp post credited u/LeshaPorche as the possible creator, though that user never appeared to have the illusion on their profile and may have deleted the original post2.

Also on December 11, u/thedemon-in-theattic posted an explanation of how the illusion works on r/woahdude, breaking down the visual mechanics for confused viewers2.

Origin & Background

Platform
Reddit (r/blackmagicfuckery), Facebook (Share After Reading)
Key People
Unknown
Date
2021

The optical illusion first appeared on the Facebook page Share After Reading on December 11, 2021, reportedly sourced from Reddit's r/blackmagicfuckery, though the original subreddit post appears to have been deleted. On the same day, u/Low-Volume-8358 posted it to r/HolUp, where it picked up over 61,000 upvotes in three days.

A top comment on the r/HolUp post credited u/LeshaPorche as the possible creator, though that user never appeared to have the illusion on their profile and may have deleted the original post.

Also on December 11, u/thedemon-in-theattic posted an explanation of how the illusion works on r/woahdude, breaking down the visual mechanics for confused viewers.

How It Spread

The image tore across social media in the days following its Reddit debut. Instagram page repostrandy shared it on December 11, 2021, pulling in over 112,000 likes within three days. Two days later, Facebook page Dank Meme reposted it on December 13, earning over 11,000 shares and 7,200 reactions in a single day.

By mid-December 2021, the illusion was everywhere. Instagram page mehmeh.69 posted a reaction version on December 13 featuring a Joe Biden "Will You Shut Up Man" image, expressing exhaustion at how inescapable the meme had become. That post pulled over 10,000 likes in a day.

The illusion resurfaced in mid-2023 when author Steve Stewart-Williams shared it on Twitter, writing: "Wow, what a powerful illusion. All the green lines are perfectly straight, but your visual system won't let you see them that way". That post accumulated over 58,000 views and sparked a fresh round of reactions, with users debating whether they could "break" the illusion by focusing or crossing their eyes.

How to Use This Meme

The meme is typically shared as a standalone challenge. Drop the image into a group chat, comment section, or social media post with the caption "go ahead, find the curved line" or something similar. The joke is that there are no curved lines to find.

Common variations include: - Straight challenge posts where the image is shared without explanation, letting viewers discover the trick themselves - Reaction edits pairing the illusion with reaction images to express frustration or disbelief (like the Biden "Will You Shut Up Man" version) - Explanatory posts where someone reveals the trick, often by isolating a single line to prove it's straight

People also share tips for "breaking" the illusion, like focusing on one line at a time or slightly crossing your eyes to make the curves disappear.

Fun Facts

Focusing on any single green line makes it appear straight, but the moment you pull back to see the whole grid, the curves return.

Some viewers claim the illusion doesn't work on them at all, insisting they only see straight lines no matter how they look at it.

One Twitter user suggested crossing your eyes slightly to neutralize the effect.

The illusion relies on the brain's edge detection being disrupted by the high-contrast noise pattern in the gray squares.

Derivatives & Variations

Joe Biden "Will You Shut Up Man" edit:

A reaction version posted by mehmeh.69 on Instagram, expressing fatigue at seeing the illusion constantly reposted. Gained 10,000+ likes in December 2021[2].

Explanatory breakdowns:

Multiple Reddit users posted detailed explanations of the visual science behind the illusion, particularly on r/woahdude[2].

Frequently Asked Questions

Find The Curved Line

2021Optical illusion / image macrosemi-active

Also known as: Curved Line Illusion · Straight Lines Illusion

Find The Curved Line is a 2021 optical illusion image macro meme with a grid of straight green lines on a gray checkerboard that tricks brains into seeing curves.

Find The Curved Line is an optical illusion meme featuring a grid of perfectly straight green lines over a gray checkerboard pattern that tricks the brain into seeing curves. The illusion went viral in December 2021 with the caption "go ahead, find the curved line," racking up tens of thousands of upvotes and shares across Reddit, Facebook, and Instagram within days. It taps into the brain's pattern recognition glitches, making viewers feel dizzy or confused as they try to reconcile what they see with what's actually there.

optical illusion memes pattern recognition memes challenge memes viral photo memes

Overview

The image shows a 7x7 checkerboard of gray squares outlined by green lines. The gray squares contain a TV static-like noise pattern. At a quick glance, the green lines look unmistakably curved, almost warping across the grid. But focus on any single line and it snaps back to being perfectly straight. The trick works because the high-contrast noise pattern between the lines disrupts the brain's edge detection, creating the illusion of curvature where none exists.

The meme version pairs this image with the challenge "go ahead, find the curved line," daring viewers to locate a curve that isn't there.

The optical illusion first appeared on the Facebook page Share After Reading on December 11, 2021, reportedly sourced from Reddit's r/blackmagicfuckery, though the original subreddit post appears to have been deleted. On the same day, u/Low-Volume-8358 posted it to r/HolUp, where it picked up over 61,000 upvotes in three days.

A top comment on the r/HolUp post credited u/LeshaPorche as the possible creator, though that user never appeared to have the illusion on their profile and may have deleted the original post.

Also on December 11, u/thedemon-in-theattic posted an explanation of how the illusion works on r/woahdude, breaking down the visual mechanics for confused viewers.

Origin & Background

Platform
Reddit (r/blackmagicfuckery), Facebook (Share After Reading)
Key People
Unknown
Date
2021

The optical illusion first appeared on the Facebook page Share After Reading on December 11, 2021, reportedly sourced from Reddit's r/blackmagicfuckery, though the original subreddit post appears to have been deleted. On the same day, u/Low-Volume-8358 posted it to r/HolUp, where it picked up over 61,000 upvotes in three days.

A top comment on the r/HolUp post credited u/LeshaPorche as the possible creator, though that user never appeared to have the illusion on their profile and may have deleted the original post.

Also on December 11, u/thedemon-in-theattic posted an explanation of how the illusion works on r/woahdude, breaking down the visual mechanics for confused viewers.

How It Spread

The image tore across social media in the days following its Reddit debut. Instagram page repostrandy shared it on December 11, 2021, pulling in over 112,000 likes within three days. Two days later, Facebook page Dank Meme reposted it on December 13, earning over 11,000 shares and 7,200 reactions in a single day.

By mid-December 2021, the illusion was everywhere. Instagram page mehmeh.69 posted a reaction version on December 13 featuring a Joe Biden "Will You Shut Up Man" image, expressing exhaustion at how inescapable the meme had become. That post pulled over 10,000 likes in a day.

The illusion resurfaced in mid-2023 when author Steve Stewart-Williams shared it on Twitter, writing: "Wow, what a powerful illusion. All the green lines are perfectly straight, but your visual system won't let you see them that way". That post accumulated over 58,000 views and sparked a fresh round of reactions, with users debating whether they could "break" the illusion by focusing or crossing their eyes.

How to Use This Meme

The meme is typically shared as a standalone challenge. Drop the image into a group chat, comment section, or social media post with the caption "go ahead, find the curved line" or something similar. The joke is that there are no curved lines to find.

Common variations include: - Straight challenge posts where the image is shared without explanation, letting viewers discover the trick themselves - Reaction edits pairing the illusion with reaction images to express frustration or disbelief (like the Biden "Will You Shut Up Man" version) - Explanatory posts where someone reveals the trick, often by isolating a single line to prove it's straight

People also share tips for "breaking" the illusion, like focusing on one line at a time or slightly crossing your eyes to make the curves disappear.

Fun Facts

Focusing on any single green line makes it appear straight, but the moment you pull back to see the whole grid, the curves return.

Some viewers claim the illusion doesn't work on them at all, insisting they only see straight lines no matter how they look at it.

One Twitter user suggested crossing your eyes slightly to neutralize the effect.

The illusion relies on the brain's edge detection being disrupted by the high-contrast noise pattern in the gray squares.

Derivatives & Variations

Joe Biden "Will You Shut Up Man" edit:

A reaction version posted by mehmeh.69 on Instagram, expressing fatigue at seeing the illusion constantly reposted. Gained 10,000+ likes in December 2021[2].

Explanatory breakdowns:

Multiple Reddit users posted detailed explanations of the visual science behind the illusion, particularly on r/woahdude[2].

Frequently Asked Questions