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Blindness
Blindness is vision loss or vision impairment. Some diseases that cause blindness are cataracts, glaucoma, diabetic retinopathy, childhood blindness, macular degeneration, onchocerciasis and trachoma.
471 Questions
There are many ways to lose your eyesight. Most blindness is caused by diseases and malnutrition. Glaucoma, cataracts, uveitis, macular degeneration, trachoma, corneal opacity, and diabetic retinopathy are the most common diseases that cause blindness. Other causes of blindness are injuries, genetic defects, poisioning and self-harm. You can also go blind by staring directly at the sun.
Why cant women be color blind?
Women can be colour blind.
Answer
I am a woman who is red--green colorblind. The trait is carried on the X chromosome. Males receive an X chromosome from their mother and a Y from their father. If the X carries the trait of colorblindness, the male will be colorblind. Females need to receive two defective X chromosomes to be colorblind, one from their father and one from their mother. If a women has only one defective X chromosome, she will be a carrier of the trait. My father was red-green colorblind and so was my mother's father, making my mother a carrier of the trait, although she is not colorblind herself. I have two sisters who are not colorblind, as they each received a non-defective X chromosome from my mother. I knew before my son was born that he would be red-green colorblind, as the X chromosome he received from me carried the trait.
What is a person that can't see or hear called?
Those who suffer from hearing loss, whether partially or completely are often referred to as 'deaf.' Deafness can be attributed to aging, genetics, illness or physical trauma. Some people are born deaf and others develop hearing loss over time.
Night blindness may be caused by a deficiency of?
I think he/she can improve her eye sight by eating spinach since it has a high value of vitamin A , which is good for eyes.
How blind people feel or read?
Blind or Visually impaired people are no diffrent than sighted people other than the fact that they have less vision. We are normal people with slight disabilities. We have to adapt to the world around us to fit our personal visual needs unlike sighted people.
Does a lack of vitamin C cause night blindness?
No, a lack of vitamin C does not cause night blindness, but it can cause scurvy. A lack of vitamin A causes night blindness.
What diseases slowly cause blindness?
Common diseases that cause blindness are onchocerciasis, syphilis, diabetes, glaucoma, trachoma. Many other less common diseases may cause blindness.
There can be genetic contributions to blindness.
Other causes can be eye trauma.
Over or under exposure of the rods and cones in the eye, such as looking at the sun or being in a pitch black room for prolonged period of time.
Certain drugs can cause blindness if taken in excess.
Certain diseases such as glaucoma.
Does watching while your eyes on the screen of TV too close hurt your eyes?
If you were to close to the TV it would most likely effend your eyes. Including if you were sitting on your sofa it wouldn't affect your eyes...but it can if you've been watching it for too long.
What does blindness symbolize in the metamorphosis?
Blindness and nearsightedness symbolize Gregor's increasing alienation from society, preventing him from even seeing the hospital where he might have been helped.
Could eye cosmetics ever cause blindness and death?
well, if you poke your eye with the mascara brush, then yes you can go blind. And I also suppose that if you got mascara in your eye you could go blind. Therefore, yes.
Are blind people afraid of the dark?
People who are truly blind cannot tell if a room is lighted or dark. They use their other senses and so are not "afraid of the dark." They may fear other things associated with not being able to see their surroundings.
There are, however, people who are "legally blind" but have some minimal ability to see, or to sense lighter and darker environments. Some of them might be afraid of the dark
When was red green color blindness discovered?
Extraordinary facts relating to the vision of colours, was the the first scientific paper written on this subject by John Dalton. He was the first recorded person in medical history with color blindness.
What type of disorder is blindness?
Its a Sex-Linked Trait, so for girls it would be XCxC or XCXcfor it recessivly for boy (They have the greater chance of getting the trait because its only located on the X chromosome) so for boys its XCY for the trait and XcY for it recessivly
How do blind people tell the different denominations of paper money?
The United States is one of the only developed countries to not currently have special sizing or any other distinct features on our paper currency to help the blind differentiate between the denominations. They must, unfortunately, rely on those around them, including strangers, to be honest. Please speak up if you ever witness anyone being taken advantage of. Fortunately, some changes are coming in the future to our paper currency that will help, but I believe this was by happenstance and not directly to help the blind in our communities. Sad.
What is the language blind people use to communicate?
They don't communicate through the use of braille they use it as their form of reading they feel the words which in this case is a series of dots and bumps which symbolise a different letter and when combined together can make words.
How can a blind person read a book?
One way blind people can read is by using braille, which is a code, a code described by many people as bumps on paper. A secondary way blind people read is auditorially. They can listen to books on different devices.
What is the life expectancy of someone with the disease blindness?
Color blindness that is inherited is present in both eyes and remains constant over an individual's entire life. Some cases of acquired color vision loss are not severe, may appear in only one eye, and last for only a short time.
It is possible that someone could go blind if kept in the complete absence of any light for a very long time. However, there have been cases of extended lack of light such as in mine cave ins where the people who were trapped for extended periods of time did regain use of their eyes after a period of readjustment to the light.
Can vinegar water make you blind?
I don't think so, I got some in my eye by accident and it just burns for a few but maybe if you keep getting it in your eye then yeah maybe..
Why do my eyes hurt while watching a big screen tv?
chances are you aren't blinking and your eyes are getting dry. If you do it often enough, you can develop a condition known as "dry eyes" and will need to use a lubricant in your eyes (such as "Refresh") on a regular basis.
