BAD HABITS OF SIGHT 

Some of the most common problems of the eye are called refractive errors. These are the problems usually seek eye care professionals in eye exams. Refraction is the change in direction of light rays to focus the light from an image. Refractive errors are problems with how to approach the eye, because of its shape, which makes us to see the blurred image. Some refractive errors are:

    * Astigmatism. Astigmatism is a problem in the curvature of the cornea. This causes part of the picture you get the eye is blurry. The corrective lenses (contact lenses or glasses) usually correct vision in people with astigmatism.
    * Myopia. Myopia occurs when the eye focuses the image of an object in front of the retina rather than directly on it. In most cases, people do not look good from afar but you can see close objects clearly. This condition tends to deteriorate a bit in childhood and adolescence, but stabilizes in adulthood. People with this condition may need glasses or contact lenses to correct vision. Laser surgery is often used in adults to correct nearsightedness permanently by changing the shape of the cornea. Laser surgery is not performed in children and teens because the eye can grow and refractive error, change.
    * Hyperopia. Farsightedness occurs when the image that comes does not focus on the retina, but behind it. This makes it difficult to see close objects clearly, although they do look good distant objects. Glasses or contact lenses can correct this problem in children and adolescents. Most adults develop a form of farsightedness called presbyopia.
Other eye problems that can affect children and adolescents are:
Blindness. Loss of view is useful. Blindness can be temporary or permanent and is due to many causes. Congenital defects or lesions in any part of the eye, optic nerve or brain region responsible for vision can lead to blindness. Visual impairment can not be corrected with surgery or corrective lenses and medical condition can be difficult to perform everyday activities. Diabetes, the problems of the macula and the changes that occur in the eye due to age are responsible for most cases of blindness in the United States.
Falls. Some children are born with cataracts, a clouding of the eye that prevents a clear view images, or simply to be seen. But cataracts are much more common in older people, who were operated on to remove and correct vision. In infants and toddlers, try the falls to avoiding permanent problems in the development of vision.
Blindness. Color blindness is caused by problems in the pigmentation of the cones of the retina. Most colorblind people see some colors. In most cases, a color blind person confuses some colors with others, usually red and green. Some people are born color-blind and some people develop this condition over time. The most common type of color blindness is an inherited condition that affects more boys than girls. Color blindness can not be corrected.
Conjunctivitis. Conjunctivitis is inflammation (redness, pain and swelling) of the conjunctiva. A variety of conjunctivitis is called pinkeye, a common contagious infection that causes red, and watery eyes and sometimes secrete pus. Acute conjunctivitis is usually treated with eyedrops. Conjunctivitis can also be caused by allergies or a scratch on the surface of the eye.
Dacryostenosis. The dacryostenosis is an obstruction of the lacrimal drainage system that occurs in the lower eyelid. It is a fairly common problem in infants but usually improve with time.
Eye injuries. Eye injuries are one of the most common preventable causes of blindness. Eye injuries can be caused by irritants such as sand, dirt or foreign bodies in the ocular surface. Chemicals or foreign bodies that are embedded in the eye may also cause pain and vision loss. A violent impact to the eye can cause bleeding inside the eye and damage to the cornea, retina and other important eye structures.
Glaucoma. One of the main causes of blindness in the United States, glaucoma is a disorder that causes increased pressure inside the eye and potentially damage the optic nerve. Although they can appear in infants and children, is much more common in older adults. Unless detected early in routine testing is not usually diagnosed until it has lost some vision.
Macular degeneration is an eye disease that mainly affects older people, but sometimes also develop babies and children. Where a person has macular degeneration, central retinal scars present. This causes the deterioration of sight over the years. In most cases, no known cause of macular degeneration but tends to run in families, indicating that genes and heredity are involved.
Retinoblastoma. It is a malignant tumor of the eye that usually appears in the first 5 years of life. It can cause permanent vision loss and the removal of the affected eye.
Retinopathy of prematurity. Sometimes, premature babies have blood vessels damage the retina, a condition known as retinopathy of prematurity, which can lead to severe vision loss in some cases.
Strabismus. It is a condition in which the eyes are crossed. Strabismus is usually caused by a defect in the balance of the force exerted by the muscles that help the eyes stay straight and move together properly. The surgery of the eye muscles can reset your eyes. If not treated in childhood can lead to permanent loss of vision in the eye less used (a condition known as amblyopia).
Sty. A stye is an infection of the follicles where the eyelashes grow. Styes are treated with hot compresses and antibiotics.