What causes blurred vision? Can usually be solved by the correct prescription for reading glasses or bifocals.
What causes blurred vision?
Blurred vision – unclear, fuzzy, or foggy eyesight is common, and seldom implies serious eye trouble.
It may affect one eye or both and often affects near vision
Sometimes only distant objects appear blurred. Rarely, the blurring may affect only a part of the field of view of one or both eyes.
This could be severe and should always be reported to your doctor.
It is also important to distinguish blurred vision from double vision, in which there are two distinctly separated images.
This should also be reported. Blurring with a slight overlap of images which never completely separate is unlikely to be severe.
Most realities about what causes blurred vision?
In most cases, blurred vision is due, to a fundamental defect in the focusing of the eye – shortsightedness, longsightedness, inequality in the curvature of the outer lens of the eye, or loss of elasticity of the inner focusing lens.
Loss of elasticity is a condition that affects middle-aged people. If this is your
problem and if you are shortsighted and already wear glasses, you may find that you can see close objects more clearly by taking them off.
Otherwise, you may need special reading glasses, or bifocals, which allow you to see both near and far objects clearly.
More rarely, blurred vision may be due to an eye disease. These include retinal arterial occlusion when there is a blockage in an artery supplying blood to the retina; iritis or inflammation of the iris; or acute glaucoma when the pressure of the fluid which keeps the eyeball in
shape builds up.
A tumor, head injury or stroke can also cause blurred vision. If you have recently been prescribed medication and find your vision is blurred, discuss it with your doctor or chemist, as individual atropine-like drugs can cause this problem.
THE Bates method of what causes blurred vision?
In the early part of this century Dr. William H Bates, an American ophthalmologist, pioneered a technique that he claimed maintained healthy eyesight.
Known as the Bates method, this technique is still taught today by Bates practitioners.
It is based on seven simple eye exercises first devised by Dr. Bates. Reports from individuals suggest that the Bates method is successful in helping about what causes blurred vision is associated with refractive errors.
However, the exercises have an educational rather than medical basis and are not intended to cure serious eye diseases such as glaucoma.
How is blurred vision diagnosed and treated?
Your ophthalmic optician will be able to perform various eye examinations.
Tests will determine whether there is a refraction problem which can be corrected with glasses.
Retinoscopy involves projecting a narrow beam of light into the eye from 65 cm. The light is moved in different directions, and the optician holds up various lenses to calculate the strength of glasses or con-tact lenses you need.
Your visual acuity, or the sharpness of central vision, is tested one eye at a time, both with and without glasses.
You will read letters of different sizes on a specially designed chart from
a distance of 6m. Your visual acuity is based on how far down the diagram you can read accurately.
If the optician finds an eye disorder unrelated to a refractive error, you will be recommended to see your doctor, who may, in turn, refer you to an eye specialist (ophthalmologist).
Your doctor will examine the inside of each eye with an ophthalmoscope, which allows him to see the entire retina.
Another examination uses a slit lamp — a unique binocular microscope
with an intense light source projected as a narrow beam, to examine the different parts of the eye.
When should I see my optician or doctor?
You should see your doctor or optician if you notice any change in your ability to see clearly. Seek help if you see that your vision is blurred, even if your sight is al-ready corrected with glasses or contact lenses.
If the blurring is in one eye only, or your eyes are painful or red, see your doctor promptly.
What will the optician or doctor do?
The optician will perform a variety of vision tests to determine whether your blurred vision is caused by a refractive error. Glasses or contact lenses can be prescribed if this proves to be the case.
If the blurred vision is thought to be caused by an eye disorder or due to high blood pressure or diabetes, for example, various investigations will be performed by specialists.
What can I do myself?
There is little you can do to prevent blurred vision, especially if it is caused by a refractive error.
If you already have glasses or con-tact lenses, you should wear them as prescribed. If you work on a VDU (visual display unit) for long periods, taking regular breaks away from the screen may help to relieve any stress on your eyes.
Working on VDUs will not make your vision any worse, although you may find that your eyes feel tired at the end of the day.
WARNING about what causes blurred vision?
If your image suddenly becomes blurred, reduces to one eye only, or is accompanied by any pain or redness, call your doctor immediately. It may be a sign of a serious eye disorder, such as acute glaucoma, retinal detachment or iritis.
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