Scientists May Have Found the Real Cause of Dyslexia—And a Way to Treat It

iStock
iStock

Dyslexia is often described as trying to read letters as they jump around the page. Because of its connections to reading difficulties and trouble in school, the condition is often blamed on the brain. But according to a new study published in Proceedings of the Royal Society B, the so-called learning disability may actually start in the eyes.

As The Guardian reports, a team of French scientists say they've discovered a key physiological difference between the eyes of those with dyslexia and those without it. Our eyes have tiny light-receptor cells called rods and cones. The center of a region called the fovea is dominated by cones, which are also responsible for color perception.

Just as most of us have a dominant hand, most have a dominant eye too, which has more neural connections to the brain. The study of 60 people, divided evenly between those with dyslexia and those without, found that in the eyes of non-dyslexic people, the arrangement of the cones is asymmetrical: The dominant eye has a round, cone-free hole, while the other eye has an unevenly shaped hole. However, in people with dyslexia, both eyes have the same round hole. So when they're looking at something in front of them, such as a page in a book, their eyes perceive exact mirror images, which end up fighting for visual domination in the brain. This could explain why it's sometimes impossible for a dyslexic person to distinguish a "b" from a "d" or an "E" from a "3".

These results challenge previous research that connects dyslexia to cognitive abilities. In a study published earlier this year, people with the condition were found to have a harder time remembering musical notes, faces, and spoken words. In light of the new findings, it's unclear whether this is at the root of dyslexia or if growing up with vision-related reading difficulties affects brain plasticity.

If dyslexia does come down to some misarranged light-receptors in the eye, diagnosing the disorder could be as simple as giving an eye exam. The explanation could also make it easy to treat without invasive surgery. In the study, the authors describe using an LED lamp that blinks faster than the human eye can perceive to "cancel out" one of the mirror images perceived by dyslexic readers, leaving only one true image. The volunteers who read with it called it a "magic lamp." The researchers hope to further experiment with it to see see if it's a viable treatment option for the millions of people living with dyslexia.

[h/t The Guardian]

Save Up to 93 Percent on 8 Gaming Accessories and Enter to Win a Free Nintendo Switch Bundle

Stackcommerce
Stackcommerce

The Nintendo Switch is one of the hottest video game consoles of the past few decades, with worldwide sales topping 55 million (that's more than the Super Nintendo and Nintendo 64, and it's only a few million behind the original NES). The problem with a console being so popular is that it's not always easy to spot one on store shelves. If you haven't had luck finding one in recent months, you can enter this contest to win your very own Nintendo Switch, along with a copy of Animal Crossing: New Horizons, a pair of Switch-compatible Logitech wireless headphones, and a $300 Nintendo gift card. Head here for more details.

While you wait to see who wins, check out these other great deals on gaming accessories.

1. Protective TPU Case for Nintendo Switch Console; $12 (20 percent off)

Geek Supply Co.

Once you get your Switch, you'll want to keep it in pristine condition. This protective case is made with shock-absorbent, flexible TPU for full protection against bumps, scratches, dust, fingerprints, and even the occasional toss in the heat of the moment.

Buy it: The Mental Floss Shop

2. Two-in-One Docking Station for Nintendo Switch Joy-Cons; $16 (20 percent off)

Geek Supply Co.

The standard Switch will only charge one pair of Joy-Cons at a time, so if you've got a roommate always willing to hop in on a quick game of Mario Kart, you'll need this spare charging dock to make sure their controller is ready to go. The weighted base keeps the controllers stable so they’ll sit still to charge until you’re ready to play.

Buy it: The Mental Floss Shop

3. Four-in-One Nintendo Switch Joy-Con Charging Dock; $18 (28 percent off)

Geek Supply Co.

Same as above, except this model charges two pairs of Joy-Cons at once. The easy-to-read red LED light lets you know it’s working, and the green lets you know it’s time to play.

Buy it: The Mental Floss Shop

4. Ultra-Slim 500-Game Retro Gaming Device (Red); $14

Atelier Delfina

This portable HD gaming device packs over 500 classic arcade games like Pac-Man, Contra, Tetris, and plenty more. And with five hours of battery life, you'll get plenty of nostalgia before needing a recharge.

Buy it: The Mental Floss Shop

5. Ninja Dragon Stealth 7 Wireless Silent Led Backlit Mouse (Black); $28 (30 percent off)

Onetify

The precision (or lack thereof) of a mouse can make all the difference when gaming on a PC. This wireless model comes with a 1600DPI true gaming sensor, ultra-precise scroll wheel, and high-precision positioning to avoid any lag while in a game.

Buy it: The Mental Floss Shop

6. Gamecube Controller Adapter for WII/PC/Nintendo Switch; $10 (50 percent off)

Geek Supply Co.

A Nintendo Gamecube controller is still the best way to play any of the Super Smash Bros. titles, and with this adapter, you can use the old-school controllers on the Wii U or Nintendo Switch for an easy way to dive into multiplayer games. It also works for PC gaming.

Buy it: The Mental Floss Shop

7. Gforce 3 Professional 7200rpm USB 3.0/Esata External HDD (Black); $140 (11 percent off)

Fantom Drives

If you haven’t already, you’re going to want to back up all of your files to an external hard drive. This external HDD has 3TB of storage, meaning you likely won't run out of space even if you tried.

Buy it: The Mental Floss Shop

8. Core 17-Inch Gaming Backpack With Molded Panel; $110 (15 percent off)

Mobile Edge LLC

This bag was designed specifically to hold gaming laptops and consoles, plus their accessories, in three large storage sections and four side pockets. It also features an external USB charge port for instant power.

Buy it: The Mental Floss Shop

Prices subject to change.

This article contains affiliate links to products selected by our editors. Mental Floss may receive a commission for purchases made through these links. If you haven't received your voucher or have a question about your order, contact the Mental Floss shop here.



100 Fascinating Facts About Earth

The best Spaceball.
The best Spaceball.
NASA

Did you know that there’s a place in the South Pacific Ocean called Point Nemo that’s farther from land than any other point on Earth? So far, in fact, that the closest humans are usually astronauts aboard the International Space Station. (And by the way: The map you’re about to look for Point Nemo on might not be entirely accurate; a certain amount of distortion occurs when trying to depict a 3D planet on a 2D surface.)

In this all-new episode of The List Show, Mental Floss editor-in-chief Erin McCarthy is journeying to the center of the Earth, and visiting its oceans, its atmosphere, and even space, in search of 100 facts about our endlessly fascinating planet.

The subjects that fall under the umbrella of “facts about Earth” are nearly as expansive as Earth itself. Geology, biology, astronomy, and cartography, are all fair game—and those are just a few of the many -ologies, -onomies, and -ographies you’ll learn about below. 

Press play to find out more Earth-shattering facts, and subscribe to the Mental Floss YouTube channel for more fact-filled videos here.