The human eye is a really complicated organ. They are like extremely powerful cameras – 40 times more powerful than the iPhone camera, according to an estimate of resolution.
So that important and precious eye protection, agency, is considered the top mission since we were born. Maybe your parents also reminded you: Don't read books in the dark, don't stand near the TV, eat lots of carrots for good …
But have you ever doubted such advice? Maybe they could be wrong. The following are really 7 eye and visual myths that people often have:
1. Eat carrots that help your eyes look better
This rumor comes from England, during World War II. At that time, the British Ministry of Food, who wanted more people to consume carrots, said: British pilots shot down German planes at night, because these pilots ate a lot of carrots.
But in the end, it was just a propaganda method. The British pilots never saw German planes at night with their eyes, they watched and shot them down through the radar.
However, it is true that carrots contain beta-carotene, an ingredient that helps our bodies produce vitamin A. This vitamin is especially important for human eyesight; Some people may be blinded by a lack of vitamin A.
But more beta-carotene is not always better – once you have enough beta-carotene to keep your eyesight healthy, your body will stop turning it into vitamin A. And anyway, there are many other non-carrot foods that still contain vitamin A such as sweet potatoes and kale …
2. Reading in the dark will damage your eyesight
This is not true. In the long term, reading in the dark will not really hurt your eyesight, the Harvard University School of Medicine website said.
However, it is true that in the short term this action will make you feel uncomfortable, because reading in low light forces your eyes to work harder, and is faster than good light.
To overcome this, you should read books with lights on the books. Don't let the light from the back over your shoulder turn down to your book, it will make you more dazzling.
3. Wearing close-up glasses will make you closer
Your glasses are measured based on the anatomical characteristics of the eye, namely the forward curve of the cornea, the refraction of the intraocular lens and the length of the eyeball. The fact that you see the world through an eyeglasses will not change those anatomical features. Wearing glasses so will not change the nearness]yours.
But there is a feeling still haunting people. It is when you're wearing the familiar glasses and putting them out, you will see the world seems much dimmer. Does this prove that you are dependent on glass and therefore your eyesight is much worse than before?
Not necessarily! According to the American Academy of Sciences, the feeling is just that you are familiar with a clear world. You are looking at a world with higher accuracy, and returning with real eyes that are close, crazy or far away, it will make you feel dissatisfied.
Even if your eyesight is on the decline every year, and you need a higher-altitude glass: This is also not the result of wearing glasses. In fact, our eyesight is constantly declining as we get older. Therefore, it is natural that you need to upgrade your glasses.
4. Looking at the screen all day makes your vision worse
This is a rumor like reading in the dark. It is true that staring at a screen for too long will cause eye irritation for a short time, but it does not cause long-term damage to your eyesight.
In fact, doctors say there is only one condition they call computer vision syndrome. But it only involves dry eyes when you look at the screen for too long without blinking. Or you may get more eye strain, because the screen actually blinks and not lights up continuously.
These problems can be overcome by replacing a monitor with a larger scan frequency, frequently blinking or eye drops. Another useful tip: after an hour or two of work on the computer, look at something far away for a few moments. It will allow your eyes to rest.
5. Blind people cannot see anything
Some blind people are completely blind, meaning that their eyes are completely unresponsive to any photon hitting it. However, there are other blind conditions, which blind people simply do not completely blind.
In the United States, the law recognizes that people with vision less than 20/200 are blind. That means they will also go out with a stick in their hands. But those who are blind in this legal category can often feel light and darkness, although the perception is very faint.
Blindness is understood as visual impairment, and does not mean zero vision. In addition, even some people who are completely blind can still react to dangers and orient their bodies in space. Science is still studying these strange blind cases.
6. Sitting too close to the TV will hurt your eyesight
Certainly many people today as well as in the past believe that modern media such as TVs, computers, and mobile phones will ruin our children's eyes. However, like reading in the dark and looking at a computer screen, sitting near the TV will not reduce your vision in the long term.
In the 1950s and 1960s, it was true that TVs without radiation shields could affect your eyes. But newer screen technologies later added a shield to protect the eyes.
Now in 2019, you can watch TV at any distance you feel comfortable with.
7. There is no way to prevent aging eyesight
It's true that most 80-year-olds have a much smoother vision than 20-year-olds. However, this is not entirely due to aging, aging is not a factor that causes you to have poor vision.
Usually, age-related visual impairment is derived from treatable eye diseases, such as cataracts. So, if you treat these diseases, you won't be "old" sight.
If you notice any visual impairment, see your doctor. This is especially true if you experience symptoms such as blurred vision, eye pain or seeing floating or ghosting spots in your vision.
The sooner you check and treat you sooner, the better your chances of recovering your eyesight.