Monday, August 16, 2010

Check your eyesight at home

If you suspect that there are problems in your vision before you contact a specialist, you yourself can do something about it. Found below test will answer some question, without any need to cancel interference ophthalmologist.

Answer "yes" or "no."
1. At the end of the day you feel tiredness in your eyes?
2. Are you feeling anxious about "burning" or "sand in the eyes?
3. Tears Do your eyes often?
4. Can you see red eyes?
5. Do you experience difficulty in focusing the eyes?
6. I sometimes appear disappear or mist in the eyes?
7. Does appear briefly double image?
8. Do you experience pain or heaviness in the temples in the eyes?

If you answered positively to questions 2-3, your eyes feel tired from the medium.
The positive response to question 4 or more indicates the presence of chronic fatigue of the eyes. To avoid a serious reduction in eyesight, you urgently need appropriate prophylaxis.

Visual acuity
This is the most important indicator of the condition of the visual system. To define it, write different letters of size 7x7 mm white sheet of paper and place it at eye level at a distance of 5 meters. If that distance distinguishes good characters, your visual acuity is 1.0. If you do not see good characters, determine the distance from which they will be visible to you. The distance in meters multiply by 0.2 (e.g. if the letters distinguish a distance of 4 meters, the sharpness of your vision will be 4h0, 2 = 0,8).

Binocular vision
One has binocular vision, i.e. image is perceived simultaneously by both eyes as a single image. Elementary functional test will help you determine his state of binocular vision. Look ahead to some point in the distance, then close your fingers slightly lower lid and watch what happens to the image.
If binocular vision is not impaired it at this time visual image splits and an image rises.
If the image is not splits, which means that function only eye over which you have not had pressure.

Angle field of vision
This is one segment of the space that is visible in the right eye view of the fixed point. For determining the outer limit of vision right eye focused look at the point at eye level. With left hand, close your eye and thumb of right hand lifted up the front and connect it with the point of focus. Remove the right hand toward the right temple, and keep focus with right eye point at right. Side vision right eye observe the situation on the thumb of his hand until his disappearance from the field of vision. If at this moment right arm is at right angles to the direction of gaze, the outer limit of the field of vision is within the norm. If the angle is smaller, the outer limit suites.

To check inner border of the same starting position (left eye is closed) outstretched right hand forward (thumb is raised up) head left to the nose. Look forward, but with the side of right eye vision watch the thumb of the hand to the disappearance of the field of vision. Once you do that, stop the movement of your hand and look to the right eye towards the nose. If, because of the barrier near the nose or you just do not see the finger, the inner border of the field of vision is normal. If the thumb is clearly visible, the inner boundary is suited.
The explanation is long, but the performance - relatively simple.

Intraocular pressure
Healthy human eye has a relatively constant intraocular pressure, which is governed by the magnitude of the inflow and the end of intraocular fluid. His exact figures can be understood in the Office of ophthalmology, where it is measured with special equipment - eye tonometer. This may be an important indicator determine independently. Naturally, this method does not claim absolute accuracy, but is suitable for initial self-examination. Press a finger over the eyelid of the eye to feel the degree of hardness. If your finger feels elastic ball which is slightly distorted by the action of pressure, your intraocular pressure is the norm. If you get rock hard, the pressure is increased, where the thumb does not feel any resistance, this is evidence of low intraocular pressure.

Age-related macular degeneration of the retina
In the elderly age-related macular degeneration of the retina is the cause of visual impairment. To open on time this pathology after the age of 60 years of age at least once week eyesight should be checked using a special test network.
Put network preferred reading distance. If you use glasses, place them. Close your left eye and right to see the point in the center of the network and answer the following questions:
1. Do you see all four corners of the network without his eyes from the point?
2. You look all the lines straight and continuous?
3. Do you see white spots appearing and disappearing at intersections?
Repeat the test with a closed right eye.
If all questions are answered positively - your eyes are fine. If your lines appear wavy or distorted, you should turn to an ophthalmologist for examination.

Threatens you cataract
The diaphragm is a simple device Shayner (among others created early in 1613), which can help us at home we can determine whether the risk of cataracts. Diaphragm may be prepared separately. For this purpose, take a small sheet of black paper or aluminum foil and using a needle to make two holes at a distance of 4-5 cm apart. Then the sheet is placed over the eyes open and is watching whatever is evenly lit surface. If you see two circles, where there are dark spots, this indicates the presence of organic haze of the optical environment of the eye, i.e. onset of cataract.

Home diagnosis is useful because it helps to find problems in time and take timely action. But it can not replace consultation with a specialist. If some of the proposed tests with you cause suspicion and anxiety, do not delay his visit to an ophthalmologist

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