Blindness

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.

No, a lack of vitamin C does not cause night blindness, but it can cause scurvy. A lack of vitamin A causes night 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.

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.

Blindness and nearsightedness symbolize Gregor's increasing alienation from society, preventing him from even seeing the hospital where he might have been helped.

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.

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

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.

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

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.

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.

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.

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.

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..

no

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.

Same as other sited people. Reading, writing, playing sports, (like beep baseball, which is an adapted version of baseball), swimming, listening to music, running track, playing videogames (we cann them audiogames-they're loads of fun!), using the computer with the help of a screen reader...anything a sited person can do a blind person can do.

It could be inherited by the parents, that would be very likely, If the parents don't have color blindness, its not very likely.

Depending on what caused their blindness and how much damage was caused, yes. Injuries such as detached retinas and conditions like cataracts can cause blindness, but are sometimes reversible through surgery. Diseases like glaucoma can also cause blindness, but be treated with some medications.

There are many different kinds and treatments vary

Night blindness is a rare disease, which affects about less than 200,000 people in the United States of America. It is a unique vision loss disease, which has many causes. This article will talk about night blindness treatment, symptoms and its causes.

What is Night Blindness?

Night blindness, also known as Nyctalopia is an inability to see clearly during night or in poor light. It is a disease which makes it difficult for the affected person to move around or drive around in the evening and night, as the vision either becomes unclear or simply impaired. It is a serious type of vision loss, that may be acquired or present from birth. Night blindness itself is a symptom of a much serious underlying medical problem.

Symptoms of Night Blindness

The way to identify a disease is through its symptoms. Some diseases have unique symptoms, which make it easy to spot and identify them. Some have ambiguous symptoms, which make it difficult to identify them. Night blindness is an eye problem which is not hard to spot, due to its unique symptoms. Here are some of the night blindness symptoms observed in affected patients:

As mentioned before, a major symptom is poor or blurred vision, in low lit areas or during and after evening time. One more symptom is prolonged vision loss after exposure to bright light.

The night blindness phases may be transient or may be getting gradually prolonged.

Persistent dry eyes is another symptom of this disease.

Night Blindness Treatment Methods According to Causes

Now that we know the symptoms of night blindness, let us see the reasons behind this vision crippling condition, that renders a person temporarily blind. Night blindness, like the tip of an iceberg, can be a sign of a much more dangerous underlying medical condition. The causes are varied and therefore, night blindness treatment also differs accordingly. Here I list the various causes of night blindness, along with the related treatment methods.

Night Blindness Cause #1: Myopia

Myopia, that is nearsightedness can be one cause of night blindness. Nearsightedness is caused by the elongation of the eyeballs, which makes it difficult to see things at a distance, due to the focus mismatch on the retina. This makes distant objects appear blurred and cause vision impairment in low lit areas.

Myopic Night Blindness Treatment

Myopic night blindness might be cured by the use of corrective glasses or lenses. In some cases, refractive surgery might be required.

Night Blindness Cause #2: Glaucoma Medications

Glaucoma is a disease which causes pressure build up on the eyes, eventually causing blindness as it affects the optic nerve. Glaucoma medications, can cause constriction of the pupils in the eyes, which may lead to night blindness. Pupils are the apertures of our eye lenses and their constriction reduces the amount of light that can be taken in, which reduces visibility, causing night blindness.

Glaucoma Medication Induced Night Blindness Treatment

The switching of glaucoma medicines may help in treating night blindness of this type.

Night Blindness Cause #3: Cataracts

Cataract is one problem which can cause night blindness. Cataract involves the progressive clouding of the eye lens, making it opaque and impairing vision.

Cataract Induced Night Blindness Treatment

Cataract induced night blindness may be treated by cataract surgeries, which can completely cure the problem.

Night Blindness Cause #4: Retinitis Pigmentosa

Retinitis Pigmentosa is a genetic disease, whose onset is declared by the condition of night blindness. As the disease progresses, the victim loses vision all together.

Retinitis Pigmentosa Induced Night Blindness Treatment

This condition is not completely curable yet but the rate of progression of this disease can be reduced by intake of vitamin A supplements and surgeries. Complete cure has not yet been found. Though future developments like retinal transplants may help in curing this problem completely.

Night Blindness Cause #5: Vitamin A Deficiency

Vitamin A deficiency is one of the prime causes of night blindness.

Vitamin A Deficiency Induced Night Blindness Treatment

The treatment for this type of night blindness is a regular intake of vitamin A. Progressive intake of vitamin A rich foods and supplements can cure this condition. Read more on

Vitamin A Deficiency Symptoms

Food Sources of Vitamin A

Night Blindness Cause #6: Diabetes

Night blindness can be a result of excessively high blood glucose levels, caused by a diabetic condition. Vision loss is a major symptom of severe diabetes.

Diabetes Induced Night Blindness Treatment

Early detection of diabetic condition and treatment methods like insulin injections, can reduce the severity of diabetes. This will reduce the possibility of further deterioration of vision. The treatment involves use of eyeglasses and in severe cases, some surgery might be required.

There are many more causes of night blindness but they are rare. One other rare genetic problem leading to night blindness is X-linked congenital stationary night blindness, which is an incurable condition.

As one can see, night blindness treatment is possible in most cases, except the genetic disorders. The probability of guaranteed cure is more with early diagnosis of the condition.

Hope I helped

Sources: medical websites

A person who is blind or visually impaired will often utilize what is called a "long white cane." These can be purchased through various vendors or obtained through state rehabilitation services. They are trained in a method called Orientation and Mobility where an instructor spends one on one time with the individual. Training with the long white cane includes everything from navigating in the home, to crossing a busy lighted intersection.

The height of the long white cane can be measured, depending on the philosophy of the organization, between the sternum and the forehead. Long white canes were historically introduced with the Veterans' Administration for soldiers coming back from the war with reduced or no vision. The were originally made from wood and had a crooked handle modeling from traditional support canes used by the elderly. Now canes are produced in aluminum, fiberglass and graphite. They are more resistant and user friendly in addition to being very light weight.

converging property of concave lens.

In myopia or short sight, light rays come to a focus in front of retina . Concave lens diverges light rays before they fall on the cornea; then they are converged by cornea and then by human lens to come to a focus on the retina. Now the image is seen clearly which was blurred / out of focus when seen without glasses.