Type of refractive error

1. Myopia

Myopia is the term medicine for nearsightedness. A condition in which the eye able to see the object near, but fled when see distant objects. In terminological, "Myopia" is derived from the language
Greek meaning squinting. patient This disorder always squinting to more clearly see objects far away. That is wrong one of the main characteristics people with myopia.

According to the expert eye treatment with this therapy betel leaf, typical of the development of myopia is increasing abnormality until adolescence, then declines in young adulthood. sometimes, myopia or nearsightedness can be caused by changes in the curvature of the cornea or the lens of the eye deformities.

Typically, myopia or we can call it nearsightedness , occurs due to prolonged eyeball axis, so that the eye oval. This causes elongation axis refractive media is difficult to focus the beam of light. In line with the prolonged axis of the eyeball, the degree of myopia or nearsightedness increases. At the age of children through adolescence, the elongation of the eyeball may be part of the growth of the body.

2. Hypermetropia 

Hypermetropia is the state of the eye which can be seen from a distance better than a short distance. Hypermetropia eye defects caused when a closer look at the object, the shadow will fall behind the retina. Hypermetropia eye is the eye with a lens that is too flat or the eyeball is too short. Objects / close objects will appear blurred because the shadow falls behind the retina, while distant objects will be visible as a shadow falls on the retina. Hypermetropia eye defects can be helped with glasses convex lens. Convex lens is convergent / collecting light, so shadows are falling behind the retina fall squarely on the retina.

What causes hipermetropi ?
Causes hipermetropi usually occur because of genetic factors (heredity). Farsightedness is a disorder of the eye that can occur at any age but tend to become more visible over the age of 40 years.
Although this is rare, hypermetropia can also be caused by other conditions such as diabetes, Mikroftalamia, cancer around the eyes and problems with blood vessels in the retina.
In addition to genetic factors and diabetes problems, the cause of farsightedness or hipermetropi is the age factor. Most of those who have Hypermetropia at the age of 50s, in which the eye's lens becomes more rigid.

3. Astigmatisma

Astigmatism or astigmatism eye is a disorder of the eye that is caused by the curvature of the cornea is uneven. These refractive errors can affect anyone regardless of social status, age and gender.

Eyeball in the normal state is shaped like a ball so that the incoming light or shadows can be captured at one point on the retina (the sensitive area of the eye). At the astigmatism, the eyeball-shaped oval like an egg so that light or shadow into the eye a little spread alias does not focus on the retina. This causes a shadow that looks to be vague and only visible at one point only. In addition, a rather distant shadow will appear blurry and wavy.

What causes astigmatism?

Astigmatism generally lowered and often arise from children. In addition, astigmatism can also be 

caused by excessive pressure on the cornea, poor reading habits and the habit of using the eye to see objects that are too close.

Any complaint astigmatism sufferers?

Untreated patients with astigmatism will often complain of headaches, eyestrain and blurred at the sight of a near and far objects. If you experience these symptoms in the long term, you should immediately to the eye doctor to see the possibility of astigmatism.

All of Type refractive error can solved by LASIK eye surgery. It is an alternative to replace the use of glasses and contact lenses