How Do Magic Eye Pictures Work?

Magic Eye's granddaddy was the random dot stereogram invented by neuroscientist and psychologist Bela Julesz in 1959 to test people’s ability to see in 3D. Julesz would generate one image of uniform, randomly distributed dots. Then, he’d select a circular area of dots within the image and shift that area slightly in a second image. Someone viewing the two pictures side by side perceive a circle floating above the background, even though the random dots had no depth cues. This supported his idea that depth perception happened in the brain, and not in the eye itself.

Twenty years later, a student of Julesz’s named Chris Tyler and computer programmer Maureen Clarke, discovered that the same thing could be done with just a single image.

Their research revealed what was happening in the eyes and brain when viewers looked at stereograms. When presented with an image like this, your eyes might each look at two different points, but because the image is a repeating pattern, the brain is tricked into thinking that the two spots are the same thing. The brain then perceives depth, with the two points as being on a virtual plane behind the pattern.

Magic Eye – which got its start in 1991 when engineer Tom Baccei, 3D artist Cheri Smith and programmer Bob Salitsky began building on Julesz’s and Tyler’s research – works by manipulating a repeating pattern to control the perceived depth and hide a three dimensional image in a two dimensional pattern.

A Magic Eye image starts with a programmer creating the hidden image (a schooner, for example) as a grayscale, smooth gradient depth map where dark points that should be furthest away are darker and closer points are in lighter shades. Then, they create a 2D pattern to camouflage that image. Finally, a computer program using a Magic Eye-patented algorithm takes the image model and the pattern and orients repeating patterns to the intended depth of the hidden image. When someone looks at a Magic Eye, the repeating pattern feeds the brain the depth information encoded into it, and the brain perceives the hidden picture.

See Also: Why Can't Some People See Magic Eye Pictures?

A Timeless History of the Swatch Watch

Jeff Schear, Getty Images for Swatch
Jeff Schear, Getty Images for Swatch

A curious sight surrounded retail watch counters in the 1980s and early 1990s. The crowds that gathered as salespeople put new Swatch watches out for purchase resembled something out of the Cabbage Patch Kid craze of just a few years earlier. Shoppers would jostle one another in the hopes of scoring one of the $30 plastic timepieces, which came in a variety of colors and designs. The demand was such that sellers often set a one-watch-per-customer limit.

That’s where the odd behavior came in. Customers would buy a Swatch, leave, then return—this time in a different set of clothes or even a wig in an effort to overcome the allocation and buy a second or third Swatch. The watches were the fashion equivalent of Beanie Babies, though even that craze didn’t quite reach the heights of needing a disguise. Limited-edition Swatches were coveted by collectors who had failed in their pursuit at the retail level and paid thousands for them on the aftermarket. The accessories simultaneously became a fashion statement and an artistic canvas.

More importantly, they also became the savior of the Swiss watch industry, which had been on the verge of collapse.

A person models a Swatch watch on their wrist
Tasos Katopodis, Getty Images for Soho House Chicago

To understand the unique appeal of Swatch, it helps to size up the landscape of the timepiece category in the late 1970s. Swiss watches, long considered the gold standard of timepieces, were being outpaced by quartz-powered digital imports from Japan that were cheap to produce and cheap to sell. Faced with the choice of buying a quality watch for a premium price or opting for a bargain digital model, an increasing number of consumers were choosing the imports. Business was down, factories were closing, and jobs were being lost.

Fortunately, a number of things were happening that would prove to offer salvation for the Swiss. ETA SA, a company that made watches and was headed up by Ernst Thomke, had recently invested in an injection-molding machine at the behest of engineer Elmar Mock. Mock, along with his colleague Jacque Muller, spent 15 months crafting a plastic prototype watch that was one piece and welded together. The significance of a sealed unit was that it economized the entire process, turning watches from handcrafted units to models that could be produced by automation. The watches required just 51 parts instead of the 91 pieces typical of most models at the time. In this way, Thomke, Mock, and Muller had produced a timepiece that was both durable and inexpensive.

The issue was why someone might opt for a Swatch watch over a digital Japanese model. Thomke knew that the idea of a “Swiss watch” still held wide appeal in the same way someone might opt for a real Chicago deep-dish pizza over an imitator’s version. Along with Nicholas Hayek, who later became CEO of the Swatch Group, Thomke believed he had cracked the code for a Swiss watch renaissance. He released the first Swatch in Zurich in March of 1983.

But the manufacturing process that allowed Swatches to come in at a reasonable price was also a problem. Automating the process meant the watches and bands were almost always identical in size and shape. If the watch’s general appearance couldn’t be changed, how could it stand out?

A selection of Swatch watches are seen on display
Anthony Kwan, Getty Images

The answer was in the design. The Swatch name came from a contraction of two words: secondary watch. The idea was that a watch could be analogous to a necktie or other fashion accessory. No one owned just one tie, scarf, or pair of dress shoes. They typically had a rotation. Thomke and Hayek didn't believe a watch should be any different.

At the behest of marketing consultant Franz Sprecher, Swatches were soon flooding stores in an assortment of colors and with different designs on the face of the timepiece itself. They could be coordinated for different outfits or occasions, a practice that became known as “watch wardrobing." Someone who bought a red Swatch for summer lounging might opt for a black Swatch as part of their professional attire. The watches retailed for $30 to $40 apiece, so buying more than one was financially feasible.

That was the concept, anyway. Some U.S. retail stores received their Swatch inventory and didn’t know what to make of what was—on the surface—a cheap plastic watch. Neither did their customers.

What Swatch needed was a marketing plan. That largely fell into the hands of marketing consultant Max Imgruth, who was named president of the company’s American division. Swatch saw their sales rise from $3 million in 1984 to $105 million in 1985. Thanks to an effective advertising campaign and more eclectic color choices, public perception of Swatches put them firmly in the fashion category.

A selection of Swatch watches designed by artist Keith Haring are seen on display
Anthony Kwan, Getty Images

The approach opened up a new market, one Thomke, Hayek, and their colleagues had not quite anticipated: Collectors were rabid about Swatches.

To keep their biannual collections of 22 to 24 watch releases fresh, Swatch began recruiting a number of collaborators to design extremely unique offerings. In 1984, they enlisted artist Kiki Picasso to design a series. The following year, Keith Haring designed his own collection. In a kind of prelude to the sneaker design phenomenon of the 1990s and beyond, these collaborators put their own distinctive stamps on the Swatches, which acted as a kind of canvas for their artistic expression.

Between third-party designers and contributions from Swatch’s Milan, Italy, design team, collectors couldn’t get enough. There was the Swatchetables line, which imagined the Swatches in a series of food-related motifs—a red-hot chili pepper Swatch, a cucumber Swatch, and a bacon-strap and egg-faced Swatch. The entire set sold for $300 and only at select food markets, quickly shooting up to $2400 in the secondary market. (Like all aftermarket Swatches, they needed to be kept in their plastic retail case in order to realize their full value.) Some resellers bought up stock in New York, then resold them for three times the price in Italy.

The 1985 “Jellyfish” model was transparent. The 1989 “Dadali” had a face with Roman numerals that appeared to be melting off the face and onto the strap. Swatches came with cuffs to honor Mozart or adorned with synthetic fur. There were Mother’s Day editions and editions celebrating the 200th anniversary of the French Revolution. Some of the straps were scented.

A selection of Swatch watches are seen on display
Anthony Kwan, Getty Images

The possibilities were endless, and so was the consumer appetite. (Except for yellow straps, which traditionally sold poorly.) Collectors camped out for Swatches at retailers or hundreds of Swatch-exclusive stores around the country. Affluent collectors dispatched employees to different retailers in the hopes of finding a limited-edition watch for retail price. If they failed, some had no problem paying thousands of dollars at auction. A Kiki Picasso Swatch, one of a very limited 121 pieces total, sold for $28,000 in 1992.

Though no one wears disguises to acquire Swatch watches anymore, the company is still issuing new releases. And while the company has seen a decline in sales over the years—the rise of smartwatches like the Apple Watch and Fitbit continue to eat into their marketing share—affection for the brand is unlikely to disappear entirely anytime soon. In 2015, one of the world’s largest collections of Swatches—5800 pieces—went up for sale, and ultimately fetched $6 million.

The Rise, Fall, and Resurgence of the Fanny Pack

Matt Cowan, Getty Images for Coachella
Matt Cowan, Getty Images for Coachella

Back in 1954, Sports Illustrated ran an advertisement for a leather pouch that was touted as an ideal accessory for cross-country skiers who wanted to hold their lunch and ski wax. Hikers, equestrians, and bicyclists could also benefit from this waist-mounted sack, which was a bit like a backpack situated on the hips.

The “fanny pack” sold for $10 ($95 today). For the next several decades, it remained popular among recreational enthusiasts traveling by bike, on foot, or across trails where hands could be kept free and a large piece of travel luggage was unnecessary. From there, it morphed into a fashion statement, marketed by Gucci and Nike for decorative and utilitarian purposes in the 1980s and '90s, before becoming an ironic hipster joke. Even the name—fanny pack—suggests mirth. But the concept of carrying goods on top of your buttocks was never meant to be a joking matter.

A man sports a ski outfit with a fanny pack in 1969
McKeown/Daily Express/Hulton Archive/Getty Images

Mankind has looked to belt-mounted storage solutions for centuries. Ötzi the Iceman, a 5300-year-old mummy found preserved in a glacier in 1991, had a leather satchel that held a sharpened piece of bone and flint-stone tools. Subsequent civilizations adopted the premise, with Victorian and Edwardian women toting chatelaine purses made of silk or velvet.

The 20th-century obsession with the fanny pack seemingly began on the ski slopes in Europe in the 1960s and '70s. Known as bauchtasche, or stomach bags, in Switzerland, skiers traveling away from the base lodge who wanted to keep certain items—food, money, a map, flares, and occasionally alcohol—within arm's reach wore them proudly. Photographers also found them useful when hiking or traveling outdoors and climbing through obstacles, as they reduced the risk of an expensive camera or lens being dropped or damaged.

Their migration into fashion and the general public happened in the 1980s, due to what Fashion Fads Through American History author Jennifer Grayer Moore dubbed the rise of “athleisure.” This trend saw apparel and accessories typically relegated to sports or exercise—think leggings, track suits, and gym shorts—entering day-to-day use. With them came the fanny pack, a useful depository for keys, wallets, drinks, and other items. They were especially popular among tourists, who could stash travel accessories like cameras and souvenirs without burdening themselves with luggage.

In the late 1980s, fashion took notice. High-end labels like Chanel manufactured premium fanny packs, often with the more dignified name of belt bag. Sporting one was considered cool, as evidenced by their presence in popular culture. The Fresh Prince, Will Smith, wore one. Members of New Kids on the Block were seen with them. Nothing, it seemed, could dissuade people from feeling pragmatic and hip by sporting an oversized pocket on their waist, which they typically pulled to the front.

A model sports a fanny pack, also known as a belt bag, across her shoulder
Hannah Peters, Getty Images

Like most trends, overexposure proved fatal. Fanny packs were everywhere, given out by marketing departments of major brands like Miller Beer and at sports arenas and stadiums. Plastered with corporate logos, they became too crassly commercial for style purposes and too pervasive. By the end of the 1990s, wearing a fanny pack was no longer cool. It was an act that invited mockery and disdain.

The pack, of course, has retained its appeal among outdoor enthusiasts, and lately has been experiencing a resurgence in style circles, with designer labels like Louis Vuitton and Valentino offering high-end pouches. Many are now being modified or worn across the torso like a bandolier (like so), an adaptation prized by skateboarders who want something to hold their goods without hindering movement.

In 2018, fanny packs were credited with a surge in overall accessories sales, posting double-digit gains in merchandise. The fanny pack may have had its day as an accessory of mass appeal, but it’s not likely to completely disappear anytime soon.

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