Posts Tagged ‘laser eye surgery’
A new therapy comes to people’s eyes, and it is the gospel to people all around the world. This modern technique is called Laser eye surgery, and it receives more and more people’s welcome.
Most of eye disorders are tired of wearing glasses all day long or are bothered with seeing nothing without glasses. They have to wear special glasses when doing sports and they are considered as being impolite for not saying hello to friends. These are all the troubles encountered by the eye disorders. Now these problems can all be settled with the appearance of Laser eye surgery. No matter how deep the degree of your glasses, you can do this surgery.
Laser eye surgery mainly has two types – LASIK and LASEK. The latter is more suitable for those with thin or flat corneas while the case of LASIK is the opposite.
Though the eye surgery is popular among the eye disorders, there is still something the surgery can’t deal with. So you must know the details about the surgery before going to do the operation.
The laser used in the surgery must have been strictly tested. Only those which can cut 0.25 microns of tissue per pulse can be applied to correcting eyesight. Furthermore, you should make sure which area of the cornea is fit for being reshaped.
Not everyone suits for the Laser eye surgery actually. Only the problems of myopia, hyperopia and astigmatism can be corrected well. So if you are in these cases, Laser eye surgery is the best choice, I promise.
You need not to worry about the food that you eat in daily life will affect the result of the surgery, so you can enjoy your food as usual. Ophthalmologist will drip some anesthetic on your eyes before operation, so you will certainly run out of being hurt. However, if you wear contact lenses, you should take them off a week before operation in case the cornea is misshaped. Moreover, people who have the problem of gas permeability need to take off contacts up to four weeks.
Laser eye surgery can be finished within half an hour, and it hardly hurts patient. Nevertheless, it’s not permitted that you drive home alone right after the surgery. So ask someone to company with you to take you home safely.
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Refractive laser surgery is usually performed for correcting common ailments of the eye such as myopia and astigmatism. All refractive surgeries do not employ the use of laser. Some surgeries such as Radial Keratotomy (RK) do not employ laser although they are equally effective in curing refractive ailments of the eye. Some common types of refractive laser eye surgery include Lasik, PRK and LASEK.
Common Method of Refractive Laser Surgery
There are various methods employed for refractive laser eye surgery. These are divided into flab procedures and surface procedures.
* Flap Procedures: In such surgeries, a particular type of blade known as microkeratome is used for cutting a flap in the corneal tissue. The most common example of surgery under this method is called Lasik.
* Surface Procedures: In this process an excimer laser is employed for removing the front portion of the corneal stroma. Unlike the flap method this approach does not require the partial thickness cut in the stroma. Thus differentiating this method of handling the epithelial layer from the flap method. Photorefractive Keratectomy (PRK) and Laser Assisted Sub-Epithelium Keratomileusis (LASEK) are two common examples of surface procedures of refractive laser surgery.
Examples of Refractive Laser Surgery
Lasik: This acronym stands for Laser Assisted In-Situ Keratomileusis. In this surgery, a flap is cut with the help of microkeratome blade. The thickness of such flap could be between 100 to 180 micrometers. The flap is then lifted and an excimer laser is used to remove the targeted tissues from the corneal stroma. The flap is then replaced after the removal of the unwanted tissues.
IntraLasik is another variant of this surgery. In this method the flap is cut with the help of laser. Where a microkeratome blade is used to create the flap, the proceedure is known as “traditional Lasik” in order to differentiate it from other forms of refractive laser surgery.
PRK: Photorefractive Keratectomy (PRK) was widely used for correcting the vision problems before the popularity of Lasik. In this surgery, the paitents recovery time takes longer than with Lasik.
LASEK: It stands for Laser Assisted Sub-Epithelium Keratomileusis and in this surgery, surface methods is used for correcting the vision problem.
The Laser Eye Center of Silicon Valley specializes in refractive laser surgery. This vision correction center specializes in all forms of Lasik, PRK and LASEK refractive laser eye surgeries.
Welcome to Laser Eye Center of Silicon Valley, one of the finest refractive laser surger centers in California.
Article Source:http://www.articlesbase.com/vision-articles/refractive-laser-surgery-1621454.html
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Thanks to continued advances in laser eye surgery, refractive surgery tools and techniques, glasses and contact lenses are fast becoming obsolete for many patients with astigmatism. Patients with undetected astigmatism often experience headaches, fatigue, eyestrain and blurred vision at all distances. Because astigmatism may not be recognized as the cause of these symptoms, this condition may go undiagnosed and continue to affect sufferers. Astigmatism can also be present in children, affecting their ability to see well in school and while playing sports.
Characterized by an irregular curvature of the cornea, astigmatism can be detected by regular eye examinations and successfully treated using procedures such as laser in-situ keratomileusis (LASIK), photorefractive keratectomy (PRK), laser epithelial keratomileusis (LASEK), laser thermokeratoplasy (LTK) and astigmatic keratotomy (AK; Table 1). An ophthalmologist can determine which type of procedure will work best for each patient.
Worldwide, >17 million people have undergone laser refractive surgery, and refractive surgery is one of the most commonly performed operations in the United States and by Beverly Hills LASIK surgeons. The newest laser-assisted procedures are approved by the U.S. Food and Drug Administration to treat up to 6 diopters (D) of astigmatism correction, which includes roughly 98% of all astigmatism patients. Advances in laser technology continue to improve treatment outcomes.
Guttman reported on a recent study by Barraquer, a private practitioner in Colombia, of 364 astigmatic myopic patients treated with a new generation “flying spot” excimer laser. Barraquer reported postoperative best-corrected visual acuity of 20/20 or better in 99% of treated eyes at 3 months. Astigmatic correction was achieved to within ±0.50 D in 92% of eyes.
Remember that for patients in or around Beverly Hills LASIK was used after the detection of astigmatism to treat it in its early and advanced stages. Because children may also have astigmatism, it is important that eye examinations be scheduled at regular intervals to detect any astigmatism early on.
Guttman C. Laser yields safe, predictable correction for astigmatism. Ophthalmology Times, Advanstar Communications, January 1, 2008;36.
Andrew I. Caster, M.D. has performed over fourteen thousand procedures to correct nearsightedness, farsightedness, and astigmatism. Dr. Caster is widely considered one of the most knowledgeable Lasik surgeons in the United States. Los Angeles Magazine selected Dr. caster as “The Best Lasik Surgeon in Los Angeles” and W Magazine listed him as one of two top Lasik surgeons in the United States. For more information please visit: http://www.castervision.com/
Article Source:http://www.articlesbase.com/vision-articles/refractive-surgery-eliminates-glasses-for-many-astigmatic-patients-1597619.html
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Myopia is commonly known as nearsightedness. It means you have difficulty seeing things that are far away. With myopia you can see clearly up close unless you have another condition that affects your close vision, such as presbiopia or astigmatism. Most myopia begins in childhood, but some factors can cause myopia to develop later in life. In adults, myopia can be corrected with laser eye surgery including LASIK.
Myopia and Your Cornea
Your cornea bends light as it enters your eye. A properly shaped cornea focuses that light on the retina. If you are nearsighted your cornea is either too curved or your eye is too long, causing the light to focus in front of the retina. When the light reaches your retina it has started to spread out again and the image is blurry.
Eyeglasses for nearsightedness have concave lenses. This spreads out the light before it reaches the cornea, so it travels farther back in the eye before it is focused.
Laser vision correction reshapes the cornea so it can focus the light properly on the retina.
What Causes Myopia?
Nearsightedness is the most common of all vision problems and affects about 30% of Americans. In the last few decades it has become more common throughout the world. The causes of myopia are uncertain, and the subject has become quite controversial.
Heredity seems to play a large role. Children of myopic parents are more likely to be nearsighted.
Lifestyle may contribute to myopia, as well. Long periods of close work, such as reading, looking at the computer screen, and possibly even watching television, may affect how a child’s eyeball develops as they grow.
It is also believed that a diet high in simple carbohydrates increases your chance of developing myopia, due to too much insulin circulating in the bloodstream (hyperinsulinemia). Hyperinsulinemia is also common in people with type II diabetes and insulin resistance. Late developing myopia is sometimes an early warning sign of diabetes risk and can eventually develop into cataracts.
Complications of Myopia
For most people myopia is an inconvenience, but relatively harmless and easily corrected with glasses or contact lenses. If corrective lenses are too much of a hassle, laser eye surgery is an option as well.
However, myopia can lead to more serious eye conditions, vision loss, and even blindness. People with myopia have an increased likelihood of developing glaucoma and retinal detachment.
Correcting Myopia
Typically, your eye doctor will prescribe glasses and/or contact lenses to correct your vision. Eye exercises can help improve your vision, especially when eye strain from close tasks such as long hours of computer use is a factor.
Laser vision correction can allow you to see clearly 24/7, without the hassle of wearing glasses or contacts.
If you are nearsighted and would like to learn more about improving your vision, please visit Eyes.com today and find out if you are a candidate for LASIK.
Article Source:http://www.articlesbase.com/vision-articles/myopia-1600072.html