There are many eye disorders. One is the visual field defects. If you have this disorder should not be underestimated, should immediately see an ophthalmologist. Because of the visual field of less area symptoms, may suspect the possibility of other diseases in the body such as brain tumor or glaucoma due to high blood pressure.
Visual field is the ability to see the entire field. Normally the edge of the view is 120 degrees, while the middle view is 80 degrees. Middle view is the ability for see objects in front of someone. While the edge view is the ability for see objects that are on the right and left side.
One cause of visual field defects due to brain tumor. Mechanism of this eye disorder is a brain tumor growth will push the blood vessels and nerves around the eyes. Further the pressure on the organ of vision. This has an impact on vision disorders. Brain tumors are usually accompanied by severe headaches.
When experiencing vision problems, you should immediately see a doctor. Most people only pay attention to visual acuity. In fact for your eye health should be a complete eye tests. There are four kinds of eye tests:
- Visual acuity test, using the Snellen chart
- Color perception or color blindness test, using the Ishihara book
- Binocular single vision tests, performed by alternately closing one eye and saw the same thing. After that the two eyes open. If the object is seen to remain one, as when one eye is closed, this means normal. But if the objects are seen more than one then there is possibility of eye disorders.
- Visual field examination, it performed by closing one eye. Suppose the right eye was closed, and then the left eye was asked to see the painting in front of him. Then without a glance, patients were asked to look at other objects besides the painting. In normal circumstances, the left eye will be able to see objects besides the painting without a glance.
To confirm the diagnosis of disease, if patients had visual field defects should undergo MRI (Magnetic Resonance Imaging).
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