Posts Tagged ‘result’

The 3 Eye Surgery Methods

There are three different to use when doing eye surgery; all of them with almost the same name: LASIK, LASEK and LASAK. The three surgery methods can be combined with two extra methods to give an even better result. The names of the two treatments are: Wavefront and Aspheric.

LASIK is the most popular of the methods. It is fast, effective and gentle. And complications using this laser surgery method are very rare. For most people, LASIK surgery will be a good method to improve their sight.

LASIK surgery is almost painless, and the sight has improved only a few hours after the operation. The side effects are few; dry is the most common. LASIK can help most people; long-sightedness until +3 and near-sightedness until -12.

The other surgery method called LASEK (or E-LASIK or ELSA) is great for people, who are only a little near-sightedness or and long-sightedness (from -2 to +2).

Because the operation is made on the surface of the corneas, the LASEK surgery is especially good, if you have thin corneas. It is also better, if you suffer of dry eyes.

The newest type of laser surgery is called LASAK. The flap, which is cut off, is thinner than when doing LASIK surgery. That saves the corneal tissue and is therefore a better method for people with thin corneas.

Other advantages of the LASAK surgery are a shorter time of healing and lesser risk of complications. There is also no pain after the operation, and the eyes will not be so dry. Finally the sight is steadier.

To improve the result even further, the Wavefront treatment can be used in combination with all of the three laser surgery methods. A special instrument is used to measure the irregularities on the corneal, and a kind of topographic map is created. A computer makes a range of calculations, so the laser surgery is carried out for the specific eye.

With Wavefront the treatment will be unique, which gives a better result. The night sight will also be better. Finally astigmatism in the eyes will be corrected better.

Aspheric treatment is the newest step in eye surgery; and is used in combination with LASIK, LASEK and LASAK. The treatment takes into account that the cornea is not ball-shaped; but aspheric.

When using LASIK, LASEK or LASAK without Aspheric treatment, the eye will be more ball-shaped. That gives a reduced contrast ratio and a bad night sight. If the Aspheric treatment is used, the curve in the central part of the eye will be made larger (as it is in an untreated eye). This gives a much better result; sometimes even better than with contact lenses or glasses.

Martin Elmer is writing about eye surgery in Laser øjenoperation. You can read about LASIK, LASEK, LASEK, Wavefront and Aspheric treatment in Lasik.

Article Source:http://www.articlesbase.com/vision-articles/the-3-eye-surgery-methods-1575232.html

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Ways to prevent cataracts formation

Astronauts receive higher daily dose of radiation, especially on a long mission such as the future Mars flight. As a result, cataracts may occur more frequently in these professionals. Currently, NASA and the National Eye Institute have been cooperating in developing a non-invasive instrument that can be used to detect very early signs of cataracts and monitor any progression.

The Alpha crystalline proteins in the lens are thought to help the lens maintain its refractive index, which allows the lens to focus light on the retina and offer clear vision. Oxidative stress may cause some proteins to break down in the lens, resulting in damaged proteins. Once these damaged proteins and other damaged cellular substances are crossly linked, they can lead to large clumps and form opacity in the lens. This opacity can gradually interfere the eyesight when they grow large enough and become cataracts.

This new instrument is supposed to evaluate the function of Alpha crystalline proteins and measure their levels as well as changes. Originally developed for space program, this measurement method can now be used to detect early signs of protein damage caused by oxidative stress. Age-related cataract, diabetes, and some neurological diseases are closed associated with oxidative stress.

Oxidative stress can be caused by UV radiation, drugs, chemicals, smoking, dietary components as well as other environmental factors. Alpha crystalline proteins in normal level can prevent these damage proteins from aggregating into clumps. However, Alpha crystalline level will be lowered due to natural aging. As a result, cataracts may develop.

As mentioned before, oxidative stress is the original cause in the lens of cataract formation. Currently, antioxidants are widely accepted to prevent cataracts, although their capacity is also unclear. In detail, lutein and zeaxanthin are two of the antioxidants that can reduce the incidence of cataract formation. A daily supplement containing antioxidants is helpful in preventing cataracts formation. These antioxidants can be gained from vegetables and fruits.

People should also control some risk factors such as smoking, obesity and eating a diet high in refined food with high sugar content. Smoking is believed to systemically decrease antioxidants in the body. Some experts also think that visible blue light can cause oxidative damage in the retina. UV protection by wearing sunglasses or UV-blocking contact lenses is also quite necessary.

More related articles:

·Causes for various congenital cataracts

·Cataract surgery preparation and outcome

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Article Source:http://www.articlesbase.com/vision-articles/ways-to-prevent-cataracts-formation-1534227.html

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Improve Your Eyesight without Glasses, Contacts or Surgery

Most of the people think that if we need to improve our eyesight, it is ought to take glasses or contact lenses or go for a surgery. But only a small fraction of people suffering from poor eyesight opt for natural ways of improving eyesight. Even though they seem to be the traditional ways of curing but they are capable of providing better vision than before. They are the safest and natural means of improving eyesight.

Most of the people think that wearing glasses or contact lenses is a must in order to strengthen eye’s vision, but the fact is that if the cause for the eye sight deterioration is known then half of the people suffering from poor eye sight can heal their problem without spending on the contact lenses and glasses.

Eye muscles are similar to any other muscle in our body. They also require proper rest and exercise for their relaxation. Poor eyesight may due to the result of misuse or overuse of the eye muscles. Hence, it is better to find out the root cause of the muscle irregularity rather than going to an ophthalmologist for a solution. The contact lens, glasses does not provide you a solution instead making you still more unclear.

The benefits of Natural treatment are more when compared to unnatural treatment benefits. The combination of eye strengthening exercises and eyesight vitamins can fetch you the best results. Even though the treatment varies from practitioner to practitioner, still it gives you the best result. Like how you train up the weak muscles of your body by doing exercises, your eye muscles also gets back their energy and strength through exercises, thus making you to see clearly without any glasses or contact lenses. One of the major differences between the natural ways and the unnatural ways is that the results of natural ways are permanent, not temporary.

When we evaluate the results of the natural means of improving the eyesight what we notice is that the result is consistent and best in those who pay attention to the overall body muscle building for example our eye muscles becomes sharper when we feel stronger and healthier. In the same way our vision will become better and better as our body becomes strengthier.

source : http://blog.itechtalk.com/2009/lose-weight-with-acupuncture/

Article Source:http://www.articlesbase.com/vision-articles/improve-your-eyesight-without-glasses-contacts-or-surgery-1478943.html

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Some Side Effects of Wearing Contact Lens are to the Disappointment of Users

The buildup of intraocular fluid on contact lenses is a possible side effect to the eyes. Lenses with such deposits are uncomfortable to wear. Users of these lenses are at risk of an eye infection. Soft contact lenses are prone to developing deposits of intraocular fluid more than hard contact lenses.

Such problems as swelling of the eyes and vision haziness that are associated with the cornea, off and on result from the use of contact lens. Lenses barricade the flow of oxygen to the corneas resulting in a condition called hypoxia. Users can suffer scrapes and scratches from lenses to their corneas. Bacterial Keratitis is a corneal infection that can result from the all time use of both soft and hard contact lenses.

Persons using lenses most of the time may suffer from inflammation of the eyelids. In some cases, inflammatory bumps appear under the eyelids. They are small but painful. Persons affected with eyelid inflammation have a painful experience of wearing contact lenses.

Developing dry eyes is one of the most common side effects that contact lens is known to have. Lenses absorb a little of fluid from the surface of the eyes and as a result, leave them dry. Users of both soft and hard contact lenses are similarly prone to having dry eyes. Severe symptoms like itching or burning sensation, redness, excessive tearing and swelling surface in case of persons with dry eyes.

People who wear lenses may also experience a kind of allergic reaction. Turning of the eyes red when lenses are inserted is a common allergic reaction. Such an allergic reaction subjects the eyes to hypersensitivity that results from the preservative used in contact lens solutions. Solutions with a different preservative are prescribed for persons with allergic reaction from lenses.

Rob Goodey is an eye specialist who is doing research on contactlenzen. For information on Contact Lens she recommends you to visit http://www.lenzencenter.nl/

Article Source:http://www.articlesbase.com/vision-articles/some-side-effects-of-wearing-contact-lens-are-to-the-disappointment-of-users-1449931.html

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Why should we have eye exam?

Eyes are the windows of human’s hearts. It’s very important to have eye exams every year or six months, because many eye problems such as cataracts, retinal problems and glaucoma offer no telltale symptoms.

Routine eye exams mainly contain several steps. The first step of an eye exam is a measure of visual acuity. Eye doctors usually use a specially designed pocket eye exam card holding at about 14 inches before patient, or a standard eye exam wall chart with a distance of 20 feet. Each eye is tested independently while the other one is covered, to confirm the smallest characters patients can read. The letters at the last column of the eye exam card provide the patient’s acuity compared with normal subjects. For example 20/200 means the patient can see at 20feet when a normal one can see at 200 feet, what indicates that the patient’s vision is very lousy. The patient can also wear his glasses to finish the same eye exams, the result are called “best corrected vision”. The second step of an eye exam is pinhole testing to determine if the eye problem is a result of refractive error. Then the observation of external structures and testing extra-ocular movements are carried out for eye exams. After that, eye doctors will use the ophthalmoscope to do closer eye exam of the outer structures of the eye and view the retina and associated structures. If needed, the eye doctor will also measure the fluid pressure in the patient’s eyes. High pressure may be a symptom of glaucoma.

Besides routine eye exams, you may also visit your eye doctor for the information of eye fashion trends or choosing prescription safety glasses.

Article Source:http://blog.firmoo.com/why-should-we-have-eye-exam.html

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