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Chapter 461 What is the world of the blind like?

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    ?

    There are many people who can't see at all, but don't they have a bad life?

    Chu Lihua suddenly came up with the idea of ??understanding the group of blind people.

    After returning home, Chu Lihua and Shangyun shared a hotel, the price was not expensive, seventy yuan, shared equally between the two.

    I don't know what Shang Yun is doing, but Chu Lihua started to check the information.

    The word blind has always been a thorn in Chu Lihua's heart.  She knew that, at an unknown moment in the future, she would become that group.

    But if there is no room for manoeuvre, then as the saying goes, knowing yourself and the enemy will win all battles, so it is good to know in advance.

    Once upon a time, Chu Lihua thought that what blind people saw was pitch black, but this was not the case.

    For patients with congenital total blindness, they are born without vision, not because their eyes cannot see, but because their brains cannot process visual information.  Since we have never seen black, how can we understand what we call "black"?

    Some patients with congenital total blindness complained that they were often asked if their eyes were completely dark, and they would feel very helpless: So what exactly is black?

    And what their eyeballs receive is "nothing", which is empty.

    What kind of feeling is this? Maybe you can try a method widely spread on the Internet: you can try to close one eye and cover it with your hand, and only use the other eye to see things.  What my eyes observe is the void in the legend, that is, there is nothing.

    Even so, congenitally blind patients also have dreams.

    Patients describe that in their dreams, no images or pictures appear, but other senses such as touch and smell can compose their dreams.

    The phenomenon of total blindness caused by various accidents and other reasons the day after tomorrow is relatively rare, but it still exists.  Usually, patients suffer from damage to the optic nerve in the brain, or blindness caused by the removal of the eyeball.

    For such a group, they have seen the appearance of various things in the world, have pictures and concepts for many things, and they can also understand what black means.

    After blindness, the world that was once visible to the naked eye suddenly became empty, and there was nothing left. According to the description of acquired total blindness patients, the picture in front of them is black, as if they were in a completely dark cave.

    Therefore, according to the survey and statistics of scientists, such patients are particularly prone to nightmares, and physical and psychological trauma increase the number of nightmares.

    Not all blind people are totally blind, and some people are partially blind. Compared with the word "blind", it may be more accurate to describe them with the word "visual dysfunction".

    People with visual impairments also have different situations. A visually impaired person named marcmuszynski in the United States sees a bright world.

    Marc is visually impaired due to a genetic mutation. His abca4 gene mutated, causing him to gradually lose his photoreceptor cells after birth.  He was born with normal eyesight, but he didn't find out that there was a problem with his eyesight until after kindergarten, when he had a vision test. He couldn't see the objects the teacher asked him to point out.  So he went to the hospital, and the doctor judged that he had visual impairment caused by a genetic mutation.

    According to marc's description, the middle of his visual picture is a blur, and he can't distinguish the color at the same time.

    In addition, his eyes are particularly sensitive to light, so when he goes out and walks in the sun during the day, the world is under a dazzling light for him, which is particularly bright.

    And every time he communicates with others, he can't see the other person's face clearly, and everything he sees is blurred. Everything in the world presented before his eyes is out of focus.

    Yes, I seem to be in this situation, right?  There's no way to focus, so you can't see clearly.

    There is a group of visually impaired patients who can only feel the existence of light, which means that their eyes can feel whether the light is shining down, and some people can even distinguish the light source, but everything else does not exist except light.  is hollow.

    In the eyes of patients with tubular vision impairment, what they can see is limited to objects within a certain range, and the range of vision is limited. This feeling is very similar to seeing everything through a tube. This disease is usually  Damage to the optic nerve.

    Simple simulation, we can roll a piece of paper into a cylinder, or put a tube directly in front of our eyes. At this time, our vision range is relatively narrow, and we will not be able to see other things outside the cylinder.  This condition is exactly what patients suffer from on a daily basis.

    See here.  ???Lihua put down her phone.

    However, soon, she remembered that she was diagnosed as achromatopsia when she was in college and just started the physical examination.

    At that time, she argued hard.  After all, full color blindness should be unable to distinguish any color!  But, to be honest, she can actually distinguish many colors!

    As for the test, Chu Lihua was speechless.

    Far away, of course she couldn't see clearly.

    However, as we get closer, they are small dots of various colors, which is equivalent to asking Chu Lihua to see a part and see the whole picture. Isn't this too embarrassing?

    At that time, this was one of the reasons why Chu Lihua left school.  She has no way to prove that she is not achromatopsia, but for her profession, there are still certain requirements for color discrimination.  In particular what color the lines represent.

    However, to be honest, if the lines are thinner, Chu Lihua really can't distinguish red, black, blue and green.

    Now that the Internet is so developed, it's time to face up to your own problems.

    It can be said that color blindness is relatively common among various visual impairments. Many people do not realize that they have color blindness without going to the hospital because of their relatively mild color vision recognition impairment.

    Color blindness can be roughly divided into red blindness, green blindness, blue yellow blindness and panchromatic blindness.

    People with protanopia see no red in traffic lights because they cannot distinguish red.

    However, blue-yellow blindness is unable to distinguish between blue and yellow. The traffic lights and blue sky in their eyes are another scene. Blue and yellow are missing in their vision:

    However, in the eyes of patients with panchromatopsia, everything is gray and dark, and there is only light and dark. This situation is quite rare.

    No, Chu Lihua can be very sure that the world she sees is not dark, but blurry.  As long as things are close, they must be colorful.

    It's just that the detection of color blindness is now judged by the color point pattern, which is obviously not so rigorous.

    However, what is the use of proving this now?

    Thinking of this moment, Chu Lihua laughed.  (Remember the site URL: www.hlnovel.com
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