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Photorefractive Keratectomy
PRK, or photorefractive keratectomy, is one of the first eye developed repair procedures. During this procedure the top layer of cells covering the cornea, epithelial layer, carefully removed. After the surgeon removed the cell layers using the Excimer laser to shape the cornea. How much corneal tissue is removed for re-formation process depends on how bad the man's eyes. PRK differs from LASIK procedure in the corneal flap is not created, so the lack of change in the cornea during PRK surgery. This surgery is often used in people who can not get LASIK because they have very thin corneas.
Custom Wavefront LASIK uses some of the latest technology to improve procedures for corrective eye surgery. Types of procedures using Wavefront technology to adjust the correction procedure LASIK someone. The advantage of this technology is that patients can have their corneas mapped down to the smallest detail. The surgeon then can achieve a better level of correction when the cornea is reshaped. Wavefront LASIK results reported improved quality of vision, decreased night vision difficulties, and reduction in halos and glare. The procedure used to correct corneal LASIK surgery as the original.
Epi-LASIK is the advanced LASIK procedure was developed to overcome some problems that arise from the LASIK procedure. Original LASIK corrects the cornea by cutting the corneal flap in itself, this procedure can sometimes cause visual disturbances such as halos, and people with thin corneas who can not undergo regular LASIK procedure. Epi-LASIK is a procedure that corrects vision by lifting the top layer of corneal epithelial tissue, the cornea is sculpted. No flap in the cornea is produced, and the epithelial layer grows back within 3-5 days. Epi-LASIK procedure can be performed in patients with thin corneas and patients with high myopia.
Lasek, or Laser-Assisted Sub-epithelial keratectomy, is the eye correction procedure performed since 1996. This procedure was developed from PRK and LASIK procedures, and was created in order to overcome the complications and problems arising from PRK and LASIK procedures. Lasek Procedure using trephine blade solutions smooth 20% alcohol and gently lift the top layer of surface epithelial layer and fold back the eye. cornea is then reshaped with the Excimer laser, and the epithelial layer is put back and left to heal. PRK procedure does not protect epithelial layer, and the LASIK procedure uses a thicker blade to cut deeper into the cornea.
IntraLase "Bladeless" eye surgery is a corrective eye surgery that uses a laser instead of a knife, to create a flap in the cornea. Corrective eye surgery 'Bladeless' is a technique available at this time. IntraLase laser works by creating a small layer of bubbles just below the surface of the cornea, this layer of bubbles allow the surgeon to gently lift the lid back without using a knife, and then the cornea is reshaped. flap was folded back after surgery and left to heal. Bladeless IntraLase procedure reduces the likelihood of complications that can occur from cutting into the cornea.
Presby LASIK, also known as Multifocal LASIK, eye correction is a procedure used to treat the eye condition called presbyopia. Presbyopia is a condition that usually occurs in people between 40 to 50 years. This condition is characterized by the inability to focus at all distances; multifocal glasses used in these cases to improve vision. Presby LASIK procedure uses a laser to reshape the eye into the design that works like a multi-focus lens. 'Peak' is often left on the cornea, and then gradually flat side. The end result is the ability to focus on near and far distance at the same time. This procedure has not been approved by the FDA, the only way to receive the Presby LASIK in the United States is to join a clinical trial.
Custom Wavefront LASIK uses some of the latest technology to improve procedures for corrective eye surgery. Types of procedures using Wavefront technology to adjust the correction procedure LASIK someone. The advantage of this technology is that patients can have their corneas mapped down to the smallest detail. The surgeon then can achieve a better level of correction when the cornea is reshaped. Wavefront LASIK results reported improved quality of vision, decreased night vision difficulties, and reduction in halos and glare. The procedure used to correct corneal LASIK surgery as the original.
Epi-LASIK is the advanced LASIK procedure was developed to overcome some problems that arise from the LASIK procedure. Original LASIK corrects the cornea by cutting the corneal flap in itself, this procedure can sometimes cause visual disturbances such as halos, and people with thin corneas who can not undergo regular LASIK procedure. Epi-LASIK is a procedure that corrects vision by lifting the top layer of corneal epithelial tissue, the cornea is sculpted. No flap in the cornea is produced, and the epithelial layer grows back within 3-5 days. Epi-LASIK procedure can be performed in patients with thin corneas and patients with high myopia.
Lasek, or Laser-Assisted Sub-epithelial keratectomy, is the eye correction procedure performed since 1996. This procedure was developed from PRK and LASIK procedures, and was created in order to overcome the complications and problems arising from PRK and LASIK procedures. Lasek Procedure using trephine blade solutions smooth 20% alcohol and gently lift the top layer of surface epithelial layer and fold back the eye. cornea is then reshaped with the Excimer laser, and the epithelial layer is put back and left to heal. PRK procedure does not protect epithelial layer, and the LASIK procedure uses a thicker blade to cut deeper into the cornea.
IntraLase "Bladeless" eye surgery is a corrective eye surgery that uses a laser instead of a knife, to create a flap in the cornea. Corrective eye surgery 'Bladeless' is a technique available at this time. IntraLase laser works by creating a small layer of bubbles just below the surface of the cornea, this layer of bubbles allow the surgeon to gently lift the lid back without using a knife, and then the cornea is reshaped. flap was folded back after surgery and left to heal. Bladeless IntraLase procedure reduces the likelihood of complications that can occur from cutting into the cornea.
Presby LASIK, also known as Multifocal LASIK, eye correction is a procedure used to treat the eye condition called presbyopia. Presbyopia is a condition that usually occurs in people between 40 to 50 years. This condition is characterized by the inability to focus at all distances; multifocal glasses used in these cases to improve vision. Presby LASIK procedure uses a laser to reshape the eye into the design that works like a multi-focus lens. 'Peak' is often left on the cornea, and then gradually flat side. The end result is the ability to focus on near and far distance at the same time. This procedure has not been approved by the FDA, the only way to receive the Presby LASIK in the United States is to join a clinical trial.
Computer Vision Syndrom
CVS (Computer Vision Syndrome) is a term used to describe a collection of symptoms caused by prolonged computer use.
Symptoms of CVS
People who suffer from CVS may experience the following symptoms:
* Dry eyes
* Headaches
* Eye irritation
* Blurred vision
* Light sensitivity
* Temporary inability to focus on a distant object (pseudomyopia)
* Double vision
* Squinting
* Neck and shoulder pain
Main source: http://vision.about.com/od/sportsvision/a/Computer_Vision.htm?nl=1
Symptoms of CVS
People who suffer from CVS may experience the following symptoms:
* Dry eyes
* Headaches
* Eye irritation
* Blurred vision
* Light sensitivity
* Temporary inability to focus on a distant object (pseudomyopia)
* Double vision
* Squinting
* Neck and shoulder pain
Main source: http://vision.about.com/od/sportsvision/a/Computer_Vision.htm?nl=1
The Right Candidate For LASIK
Refractive surgery is not for everyone. In addition to the ownership of a complete eye examination to find whether you are a candidate (candidates) for the operation, there are certain questions you should ask yourself before considering LASIK or other refractive procedures.
1. Am I willing to accept a risk of surgical complications is small but real? Although modern Lasik is very safe with rare complications, still there are times when complications occur that can not be avoided that can negatively affect your vision.
2. Is my career allowed me to get LASIK? Although now there are few organizations that prohibit certain employees or their members get refractive surgery, if there is any doubt, it is important to ask your employer, community worker, or military service whether you are allowed to undergo refractive surgery.
3. Does my vision has been stable long enough to get LASIK? While minor changes in your prescription is not uncommon from year to year, if your prescription continue to be progressively stronger (ie, more myopic, more hyperopic, astigmatism or more) every year, then you might still not a candidate Good for refractive surgery.
4. Do I have any health conditions that make me a bad candidate that operation? Certain autoimmune diseases that have been advanced, such as lupus and rheumatoid arthritis, may affect healing after surgery.
5. Is my recreational activities make me a bad candidate for surgery? There is a lifetime risk of dislocation cover LASIK if there is an injury (trauma) is significant at the eye, so the people who participate in contact sports such as boxing, martial arts, or wrestling is not likely to be a good candidate for LASIK. In these circumstances, other refractive procedures, especially surface ablation, is perhaps the choices more appropriate.
6. Am I too young or too old for LASIK? There are no rules hard and fast about the right age for LASIK. However, patients under 18 years are rarely stable enough for LASIK, and patients who are older may begin to develop cataracts, cataracts or eye health problems that prevent them other than to undergo LASIK. Once again, the best way to determine these things is to get a full eye examination.
7. Do I have keratoconus? Keratoconus is a corneal disease that resulted from the reduced strength of the cornea that can be detected as an abnormal curvature of the test. Patients who have evidence of keratoconus are not candidates for LASIK or surface ablation, but new technologies may be available for these individuals.
1. Am I willing to accept a risk of surgical complications is small but real? Although modern Lasik is very safe with rare complications, still there are times when complications occur that can not be avoided that can negatively affect your vision.
2. Is my career allowed me to get LASIK? Although now there are few organizations that prohibit certain employees or their members get refractive surgery, if there is any doubt, it is important to ask your employer, community worker, or military service whether you are allowed to undergo refractive surgery.
3. Does my vision has been stable long enough to get LASIK? While minor changes in your prescription is not uncommon from year to year, if your prescription continue to be progressively stronger (ie, more myopic, more hyperopic, astigmatism or more) every year, then you might still not a candidate Good for refractive surgery.
4. Do I have any health conditions that make me a bad candidate that operation? Certain autoimmune diseases that have been advanced, such as lupus and rheumatoid arthritis, may affect healing after surgery.
5. Is my recreational activities make me a bad candidate for surgery? There is a lifetime risk of dislocation cover LASIK if there is an injury (trauma) is significant at the eye, so the people who participate in contact sports such as boxing, martial arts, or wrestling is not likely to be a good candidate for LASIK. In these circumstances, other refractive procedures, especially surface ablation, is perhaps the choices more appropriate.
6. Am I too young or too old for LASIK? There are no rules hard and fast about the right age for LASIK. However, patients under 18 years are rarely stable enough for LASIK, and patients who are older may begin to develop cataracts, cataracts or eye health problems that prevent them other than to undergo LASIK. Once again, the best way to determine these things is to get a full eye examination.
7. Do I have keratoconus? Keratoconus is a corneal disease that resulted from the reduced strength of the cornea that can be detected as an abnormal curvature of the test. Patients who have evidence of keratoconus are not candidates for LASIK or surface ablation, but new technologies may be available for these individuals.
Main Types of Refractive Errors
In our eyes, the front surface (cornea) and the lens inside the eye to form "convergence system (focus)" eyes and is primarily responsible for the concentration (focus) light rays on the surface of the retina, very like the lens of a camera ray mengfokus on the film. In a perfect optical system, the strength of the cornea and lens are perfectly matched with the length of the eyes and the pictures are in focus; any discrepancies on this system is called a refractive error (refractive error), and the result is a blurred image at several locations .
Myopia (nearsighted): In people with myopia, a mismatch in the power of concentration (focus) and the length of the eye causing distant objects are blurred and near objects more clearly.
Hyperopia (eye distance): In people with hyperopia, the discrepancies in the power of concentration (focus) and eye length causes nearby objects are blurred and distant objects are relatively clear.
Astigmatism: In people with astigmatism, one of the shape of the cornea or lens shape distorted, causing a variety of images on the retina. This causes the objects at all distances appear blurred. Many people have a combination of one of the myopia or hyperopia with astigmatism.
Myopia (nearsighted): In people with myopia, a mismatch in the power of concentration (focus) and the length of the eye causing distant objects are blurred and near objects more clearly.
Hyperopia (eye distance): In people with hyperopia, the discrepancies in the power of concentration (focus) and eye length causes nearby objects are blurred and distant objects are relatively clear.
Astigmatism: In people with astigmatism, one of the shape of the cornea or lens shape distorted, causing a variety of images on the retina. This causes the objects at all distances appear blurred. Many people have a combination of one of the myopia or hyperopia with astigmatism.
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