color blindness called any color perception problems.It can cause many problems.So, it hinders learning and prevents build a career.However, people who are color blind can learn to compensate for this lack of vision.
most common cause of color blindness - the genetic, iepredisposition to disease is laid on an embryonic stage.Cases of congenital color blindness.
The human eye has three types of light-sensitive pigments: red, green and blue.Colors are formed by refraction of light in them.The more sensitive pigments, the more colors can distinguish people.Most of the light-sensitive bulbs is in the macula (the central retina) of the eye.
Blindness develops in the case, if at least one of these pigments may stop functioning.In this case, the eye loses its ability to distinguish shades of dead cones.
Fortunately, blindness is not always inherited.In some cases, it is an acquired disease.The reasons could be:
symptoms Symptoms of color blindness are:
To see if you are really sick color blind, you should see a specialist, who in turn will offer you to pass the following tests.
In the case of hereditary color blindness disease is not treatable.If the acquired color blindness, then, depending on its causes, it can be completely cured, or at least reduce the symptoms.For example, if the cause of color blindness is cataract surgery to remove it will help to restore normal vision.
color blindness can also reduce the symptoms of wearing colored lenses or anti-glare glasses.Also, inconvenience caused by the disease, can be compensated, for example, due to the fact that the object to orient in searching the attributes such as brightness and location.
Vision problems can seriously degrade the life of a child.Because of them, it will have difficulty in learning that inevitably entail a low mark and, consequently, low self-esteem.
How to prevent it?You must do the following:
«Tennis Elbow" - a pain in the elbow, caused by overexertion of muscles of the shoulder and forearm.Widespread among professional tennis players...
causes of diffuse muscle pains are still outstanding. search of explanations of nature and development of the mechanism of fibromyalgia is car...
killing and disabling infection remains an urgent problem even today.Who in Russia today is sick with syphilis and who threatens to infection wi...