Technology What Happens to Your Eyes If You Look Directly at the Sun During a Solar Eclipse?

19:33  20 august  2017
19:33  20 august  2017 Source:   Time

Amazon is issuing refunds to customers who purchased suspect solar eclipse glasses

  Amazon is issuing refunds to customers who purchased suspect solar eclipse glasses Amazon is refunding customer purchases for protective solar eclipse glasses that it hasn’t been able to confirm come from a reputable manufacturer, according to a safety notification from the company. Excitement has been building for the upcoming solar eclipse across the United States on August 21st, and would-be eclipse viewers have purchased protective glasses from retailers such as Amazon.com. However, not all of the glasses found on the site are safe to use, with some vendors selling counterfeit or unsafe versions. Amazon appears to have been cracking down on these suspect glasses.

But what actually happens to your eyes when you try to hold a staring contest with our closest star? In sufficient concentrations, like during a long look at the sun , these can damage surrounding tissue. Map: Waffle House Locations With Views of the Solar Eclipse . Friday 3:15pm.

Looking directly at the August 21, 2017 solar eclipse can damage your naked eyes . Here's what you need to know and how to protect yourself. What Happens to Your Eyes If You Look Directly at the Sun During a Solar Eclipse ?

The Age of Totality: <p>The sun is 400 times larger than the moon — but it's also 400 times further away. So when the moon's orbit takes it across the ecliptic — the apparent path of the sun through the sky — it can fit across it exactly. It happens roughly once every 18 months. Since the moon is drifting away from Earth at 3.8cm every year, such perfect total solar eclipses will not always occur. So we're born lucky, in an age of totality, but don't feel too blessed: The moon will one day be too far away from Earth to totally eclipse the sun (but that will take 538 million years).</p> 10 Things to Remember While Watching the Total Solar Eclipse

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For the first time in U.S. history, a solar eclipse will travel exclusively across America, enabling millions of people to view the moon block out the sun on Aug. 21. But those who watch this rare celestial event need to take precautions, because staring right at the sun can quickly harm your eyes.

“Looking directly at the sun is unsafe except during the brief total phase of a solar eclipse (“totality”), when the moon entirely blocks the sun’s bright face, which will happen only within the narrow path of totality,” NASA explains on its website. “The only safe way to look directly at the uneclipsed or partially eclipsed sun is through special-purpose solar filters, such as “eclipse glasses.”’

Man with eye damage from 1962 eclipse: Don't make the same mistake I did

  Man with eye damage from 1962 eclipse: Don't make the same mistake I did Fifty-five years ago, Lou Tomososki looked at an eclipse for a few seconds and damaged his eye forever.While watching, he saw flashes of light, much like he would after having a picture taken with a camera with a flashbulb. He had no idea those flickers would lead to permanent damage.

The only time that the Sun can be viewed safely with the naked eye is during a total eclipse , when the Moon completely covers the disk of the Sun . It is never safe to look at a partial or annular eclipse , or the partial phases of a total solar eclipse , without the proper equipment and techniques.

During a partial eclipse , part of the Sun is still visible, and the Sun is dangerous to look at. You will need protec-tion for your eyes before you can look directly at the Sun —or you will need to project an image of the Sun (see instructions starting on p. 8).

The path of totality, which is about 70 miles wide, is viewable from parts of 14 states, as shown on this solar eclipse map, and only lasts a maximum of two minutes and 40 seconds, according to NASA. Before and after the total solar eclipse, those in its path will see a partial eclipse, in which the moon only partly blocks the sun. The rest of the country will also see a partial eclipse — so essentially, everyone needs to prepare themselves to view the eclipse safely.

Here’s what you need to know about why a solar eclipse hurts your eyes and how to protect your eyes effectively:

Why Does a Solar Eclipse Damage My Eyes?

According to experts, viewing the sun with your naked eye during the eclipse can burn your retina, damaging the images your brain can view. This phenomenon, known as “eclipse blindness,” can cause temporary or permanent vision impairment, and in worst-case scenarios can lead to legal blindness, which entails significant loss of vision.

What time is the solar eclipse where I live?

  What time is the solar eclipse where I live? You'll need perfect timing to catch the exact moment the moon blocks the sun in your city. The total solar eclipse on Aug. 21 lasts less than a minute in some places, while a partial eclipse can be visible for an hour or more.

Solar eclipse safety. You should never look directly at the sun , but there are ways to safely observe an eclipse . There is one time when you can safely look directly at the sun : during a total eclipse , when the sun 's Total Solar Eclipse : If You Can't See It Live, Use Virtual Reality with Volvo, CNN.

eclipse What Happens to Your Eyes If You Look Directly at the Sun During a Solar Eclipse ? Scenic spots across the country have long been booked up by people excited about the eclipse , but each state still has spots where the public can see the eclipse at the last minute.

  What Happens to Your Eyes If You Look Directly at the Sun During a Solar Eclipse? © Getty Images “If people look without the proper protection [at the sun], they run the risk of injuring their eyes. And if they get an injury, depending on how often and how long they look at the sun without the protection, they do have a substantial risk of developing a permanent loss of vision,” said Dr. B. Ralph Chou, president of the Royal Astronomical Society of Canada and a former optometry professor. It is not possible to go completely blind from looking at the eclipse, Chou said, because the injury is limited to the central part of your visual field.

There are no immediate symptoms or pain associated with the damage — the retina doesn’t have any pain receptors — so its hard to know at the time if you’ve actually been afflicted with eclipse blindness. If you look at the sun unfiltered, you may immediately notice a dazzle effect, or a glare the way you would from any bright object, but that doesn’t necessarily mean your retina is damaged. According to Chou, symptoms generally begin occurring 12 hours after viewing the eclipse, when people wake up in the morning and notice their vision has been altered.

If you're watching the total solar eclipse, don't forget to wear sunscreen

  If you're watching the total solar eclipse, don't forget to wear sunscreen Be sure to wear sunscreen — especially if you're planning to view it for a long time.&nbsp;While you might be more concerned with keeping your eyes safe from the sun, the hour or two you spend watching the whole process will leave your skin exposed.

During a solar eclipse , like the one that will be visible from Illinois on Aug. 21, you should not look directly at the sun without strong protective eye wear.

Looking directly at the sun without eye protection can cause serious eye damage or blindness. But there are ways to safely observe the sun . During a partial solar eclipse , people often use pinhole cameras to watch the progress of the moon across the sun 's surface

“They can’t see faces in the mirror, they can’t read the newspaper or the smartphone display, they’re having trouble looking at road signs, and basically they’ve got this center spot in their vision that is intensely blurred,” Chou said.

There are no remedies to effectively mitigate the injury, said Chou, aside from waiting and seeing if the patient regains vision. This does happen, but not until at least three months after the injury.

Has This Happened Before?

Yes. People have hurt their eyes by watching the sun during a solar eclipse unfiltered. However, it is a relatively rare occurrence. Although Chou said there is no definitive data on the number of people afflicted with eclipse blindness, he noted that after a solar eclipse crossed Britain in 1999, ophthalmologists reported 70 instances of eye injuries, and the majority of those people had viewed the eclipse unfiltered. In Canada, 20 cases were reported following the total solar eclipse of 1979. Of the cases reported over the years, Chou said half the people afflicted completely recovered their vision over the course of the following year.

How to Track the Solar Eclipse Without Going Outside

  How to Track the Solar Eclipse Without Going Outside Too lazy or busy to see the sky? Check out NASA's live broadcast or follow these hashtags to take part in the spectacle.Space fans across the U.S. are doing it big for the solar eclipse coming Monday. They're flying and driving to certain locations along the path of totality, where people will have the best view of moon covering the sun. They're reserving hotel rooms that cost eight times more than they normally do. They're buying eclipse glasses, intended to protect your eyes from sun damage, by the thousands.

First of all, it is perfectly safe to look directly at the totally eclipsed Sun during a total eclipse of the Sun . Thousands of people do this at every total eclipse -- I've done it twice myself. Viewing a solar eclipse is fine if you wear specialized sunglasses.

Your eyesight. And it could be terribly damaged if you don’t know how to protect it during a solar eclipse . What happens to unprotected eyes . Not using certified glasses as directed will damage your eyes — and generally, you should never directly look at the sun , whether it’s an eclipse day

“It’s a fact that for individual practitioners, they are not seeing that many [cases] overall,” Chou said. “It’s only if you start looking at large populations in the hundreds of millions that you start adding up into significant numbers.”

What Can I Do to Protect My Eyes?

To ensure your experience is injury-free, listen to NASA’s advisory and buy eclipse glasses, which block approximately 99.99% of light rays. But also make sure follow NASA’s instructions in using these glasses. When the glasses are on, NASA says, it is imperative that you don’t look at the sun through an unfiltered camera lens, telescope, or binoculars.

Additionally, make sure that the brand of glasses you buy has been verified to meet the international safety standard, something Chou emphasized as critical to injury prevention. The American Astronomical Society has released a list of manufacturers selling these glasses that meet this standard. NASA also suggests you inspect your filter before putting it on, and discard it if it has any scratches or damages.

“If you don’t try to sneak a peek without the filter,” says Chou, “Then you should not run any risk of being hurt.”

This article was originally published on TIME.com

Signs of eye damage from staring at solar eclipse .
<p>Ophthalmologists expect to see a few patients who might have injured to their eyes by staring at the sun during Monday's solar eclipse.</p>Called solar retinopathy, the injury occurs when the sun rays damage the retina, a layer of light-sensitive cells in the back of the eye.

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