vision

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Researchers Figure Out What's Hurting Astronauts' Vision

A buildup of spinal fluid around the eyes, say researchers

(Newser) - One serious drawback for astronauts who spend long periods in space is that they often return to Earth with degraded vision, and a new study may have pinpointed the problem. It's a buildup of spinal fluid around the eyes, say researchers from the University of Miami. This cerebrospinal fluid... More »

Pot Might Help You See in the Dark

Cannabinoid shown to improve night vision in tadpoles

(Newser) - A new study suggests that marijuana may have a strange benefit: improving night vision. Based on a pharmacologist's observation in the 1990s that Jamaican fishermen who smoked or consumed cannabis had "an uncanny ability to see in the dark," researchers at McGill University dug in. They applied... More »

Boy Sees Mom Clearly for First Time: 'She Was Pretty'

Chris Ward's community more than foots $15K bill

(Newser) - Chris Ward, a 12-year-old fifth-grader from Bedford County, Va., was born with optic nerve hypoplasia, a condition that limits his vision to objects within just 5 inches of his face. He's learned to read Braille and do math using an abacus. But when his mother and teacher took him... More »

Woman Loses Vision After Weight-Loss Surgery

Not to mention severe pain and lesions on her eyes

(Newser) - After a Texas woman had gastrointestinal surgery, she lost weight as expected—but she also lost her vision. According to a study published last week in JAMA Ophthalmology, the woman in her 40s started complaining of deteriorating vision, eye pain, and lesions on her eyes. Study author Kyle Kirkland tells... More »

Some People Are Born Without a 'Mind's Eye'

Aphantasia impairs one's ability to visualize

(Newser) - When science journalist Carl Zimmer wrote a 2010 article in Discover magazine about English neurologist Adam Zeman's case study of a man who couldn't visualize people or things, the professor was approached by 21 people who saw themselves in the article and wanted to learn more. Now Zeman... More »

This Is How a Newborn Sees You

Researchers reconstruct how newborns see the world

(Newser) - Researcher Svein Magnussen wondered 15 years ago whether newborns can make out people's facial expressions, but says he didn't yet have the tools to investigate. Now, thanks to modern simulation techniques, as well as a wealth of information from previous studies, the University of Oslo professor and other... More »

Mud Run Leaves Woman Blind in Eye, With $100K Bill

Uninsured mom faces flesh-eating bacteria, steep medical tab

(Newser) - A young mother in Texas who holds down two jobs but doesn't have health insurance is in the fight of her life—doing battle with not just the necrotizing fasciitis that has already claimed the vision in her left eye but also with her $100,000 medical bill. It... More »

Scientists' Latest Craze: 'the Dress'

Blue and black? White and gold? Assumptions about lighting are key

(Newser) - Not one, but three new studies emerged this week in a scientific journal seeking to explain the still-puzzling Internet phenomenon that is the Dress . "There will be dozens and dozens of papers about it over the years. This is just the beginning," Wellesley professor Bevil Conway tells the... More »

The Way You Apply Eyeliner Could Be Unhealthy

If you're a contact lens wearer, that is

(Newser) - Your dramatic eye makeup could actually be unhealthy for your eyes assuming you're a contact lens wearer, according to a tiny pilot study that appears in Eye and Contact Lens Science and Clinical Practice . The study involves the "waterline." That's the thin inner portion of the... More »

Computer Screens Aren't Making Us Nearsighted

Not exactly anyway: It's more about too much time spent indoors, researchers say

(Newser) - Rates of nearsightedness are rising so quickly around the world that the phrase "myopia epidemic" is being tossed around. Everybody's squinting over their smartphones, laptops, e-readers, and other gizmos so much that tech must be to blame, right? Well, it plays a role, "but not in the... More »

We Can Only See 30 Shades of Gray

Meanwhile, 'Fifty Shades' shown to 'SpongeBob' audience

(Newser) - Human beings can only see around 30 shades of gray, according to a bit of trivia Popular Science says it found in a research paper and has decided to share "for no particular reason whatsoever." The exact number of shades of gray we can distinguish will vary a... More »

We Were Tricked Into Thinking Carrots Improve Vision

But it turns out to be kind of true

(Newser) - Eating lots of carrots will improve your vision, right? Not exactly, the American Chemical Society explains in a new video . Bottom line: Carrots can contribute in a general way to overall eye health, but they're not going to prevent you from needing glasses. As the ACS video explains, carrots... More »

Brain Pathway Science Forgot Is Rediscovered

Vertical occipital fasciculus is involved in visual perception, attention, etc.

(Newser) - In 2012, a team of researchers out of the University of Washington's Institute for Learning and Brain Sciences thought they'd stumbled upon a new pathway in the brain associated with reading that had somehow been glossed over by their predecessors. "We couldn't find it in any... More »

Google Glass Messes With Your Peripheral Vision

Small study finds obstruction in the user's upper right quadrant

(Newser) - Ever wonder if the small computer monitor on the top right of Google Glass gets in the way of a user's vision? An ophthalmologist at UC San Francisco almost got in a car accident when he didn't see a car coming from the right, and he decided to... More »

Meet the Woman Who Can See 100 Times the Colors You Can

Concetta Antico is a tetrachromat: her eyes have four cones

(Newser) - If you're a tetrachromat—which, odds are, you aren't—you can see more colors than the rest of us, thanks to an extra structure in your eyes. The structure, known as a cone, detects certain light wavelengths. With three cones, most of us can see about a million... More »

Man Blind for Decades Sees Again With Bionic Eye

Larry Hester is country's 7th recipient of device

(Newser) - It's been 33 years since Larry Hester started going blind. But thanks to a new bionic eye, the 66-year-old is experiencing vision once again, Duke Medicine reports. Granted, "it's not vision as we traditionally know it," a Duke University scientist tells Duke Medicine. But "turning... More »

Stem Cell Blast Returns Sight to the Legally Blind

Preliminary study surprises researchers

(Newser) - When researchers infused tens of thousands of new stem cells into the retinas of legally blind people, they didn't expect a breakthrough in the patients' vision. But that's what they got, NPR reports: Ten of 18 subjects experienced significant improvement in their vision. The study was intended only... More »

How Smartphones Could Someday Correct Your Vision

MIT researchers develop 'vision correcting display'

(Newser) - If you're blind as a bat with Coke-bottle glasses, there may be hope for you—new research out of MIT could make it easier to read your tablet, smartphone, or eReader, LiveScience reports. Scientists there have developed a transparent "vision-correcting display" that goes on the screen of an... More »

Eyes of the Dead Could Help Living See

Cell transplants restore brain, eye connection

(Newser) - A new technique could dramatically improve the ways in which the eyes of the dead can help restore sight to the blind, according to research published in the journal Stem Cells Translational Medicine . Researchers extracted a type of adult stem cell from the back of donated eyes and found that... More »

Feds OK First 'Bionic Eye' to Help Blind

Device gives limited vision to those with retinal disease

(Newser) - The FDA has approved the first use of an artificial retina or "bionic eye" to give the blind limited vision, reports the New York Times and Wall Street Journal . Users wear glasses outfitted with a video camera that transmits visual data to electrodes implanted in the eye; the signals... More »

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