By Matthew J Miller
Hypermetropia is also referred as the long sightedness in which the person is able to see the images at the distance more clearly as compared to the images at the closer view. Scientifically, in this defect the light rays are focused behind the retina that should be correctly formed on the retina. Hypermetropia is caused either by the flattening of the cornea or the shortening of the eyeball. The defect can even be caused due to the combination of both.
The Laser surgery corrects the Hypermetropia by making the cornea of the eye steeper so as the rays of the light get refocused at the back of the eye.
Laser corneal sculpting is the medical procedure to treat Hypermetropia which consists of the use of the laser in order to reshape the surface of eye.
The cornea of the eye is the transparent tissue which covers the front of eye and helps in controlling the focus. In the laser surgery, a computer-controlled laser is utilized for removing the microscopic amounts of the tissue from the front surface of the eye called the cornea.
In the operation called photorefractive keratectomy, a thin outer layer from the cornea that is called the corneal epithelium is removed and then the underlying layers are reshaped.
In LASIK laser surgery, a thin flap of the corneal tissue is made with a fine instrument called a microkeratome or a femtosecond laser. After that the flap is lifted out and the underlying tissue is reshaped and then the flap is replaced so as to cover the new recontoured surface.
Hypermetropia is not the disease but only a defect in the eye that is needed to be treated by surgery only in cases if the person can not wear eye glasses or the contact lenses. The person should be of minimum age of 20 to consider the laser surgery. The refractive error should be stable. The people suffering from diabetes, the uncontrolled rheumatic conditions or the diseases of immune system should avoid the surgery. The people with abnormally shaped cornea or very thin cornea should also avoid it.
The laser does not burn the tissue instead vaporizes the small amounts of cornea in each shot. The diameter of laser beam as well as the number of pulses is directed are controlled by the computer technology.
After the surgery the person can the eyes dried or even may get an infection that is to be treated with the antibiotics.
Matthew J Miller is the administrator of 'DenverLasikDoctors.com', a Denver Lasik informational website. Denver Lasik Doctors provides a way for local surgeons to prove their expertise to potential clients. Local Denver, Colorado doctors provide valuable free information to potential Lasik eye surgery patients.
Article Source: http://EzineArticles.com/?expert=Matthew_J_Miller
Monday, November 2, 2009
Sunday, November 1, 2009
Facts About Pigmentary Glaucoma
By Jenny Styles 
Glaucoma consists of several types of disorders of the eye, pigmentary glaucoma being one type which, fortunately, is rather rare. The primary symptom of glaucoma in the eye is the buildup of internal eye pressure, or intraocular pressure (IOP). This buildup, if untreated, can eventually damage the optic nerve and in a worst case scenario, result in blindness.
The interior of the eye is filled with a fluid, aqueous humor. The eye is constructed to allow occasional draining or discharge of some of this fluid to prevent the internal pressure of the eye from becoming too great. When glaucoma is present, the drainage mechanism has been interrupted, leading to increasing pressure. This normally occurs without causing pain or other noticeable symptoms, and often is not detected until significant damage to the eye has already been done.
Pigmentary glaucoma occurs as the result of a condition known as the pigment dispersion syndrome. Pigment granules are normally attached to the back of the iris. These granules can sometimes flake off into the aqueous humor, and eventually find their way to the interior eye drainage canals where, over a period of time, the granules will begin to block the canals. Once that happens, the pressure on the interior of the eye will begin to increase. At the point where this pressure begins to cause damage to the optic nerve, the pigment dispersion syndrome has developed into pigmentary glaucoma.
This rare disease occurs in men more so than women, and tends to strike men in their twenties and thirties. In addition, myopic (nearsighted) people seem to be at a slightly higher risk of contracting pigmentary glaucoma than for those having normal vision or are farsighted. Sometimes, the first, and only, signs that the condition is present, comes during or immediately following exercise, such as jumping or jogging, where vision may become temporarily blurred. More often than not though, noticeable symptoms do not occur.
Pigmentary glaucoma is treatable when not too far advanced. Treatment is designed to prevent a further flaking off of the pigment granules, and usually is in the form of eye drops, Optipranlol and Xalatan being two medications commonly prescribed. In addition there is a class of drugs called miotics, which sometimes are called into play. Most of these treatments cause no significant side effects, though incidences of blurred vision sometimes occur which may restrict their use. In recent years, laser surgery has been employed to open the drainage canals and relieve the pressure. Another laser-based treatment is to create a small hole in the iris. This results in the iris moving slightly away from the lens, lessening the chance of pigment dispersion which occurs when lens fibers scrape against the iris.
Other types of glaucoma generally strike in later years, although myopic individuals are still slightly more at risk, and tend to get the disease earlier in life. No matter what one's age is, glaucoma of any type is a threat to one's vision and any problems associated with vision should be promptly looked into.
The interior of the eye is filled with a fluid, aqueous humor. The eye is constructed to allow occasional draining or discharge of some of this fluid to prevent the internal pressure of the eye from becoming too great. When glaucoma is present, the drainage mechanism has been interrupted, leading to increasing pressure. This normally occurs without causing pain or other noticeable symptoms, and often is not detected until significant damage to the eye has already been done.
Pigmentary glaucoma occurs as the result of a condition known as the pigment dispersion syndrome. Pigment granules are normally attached to the back of the iris. These granules can sometimes flake off into the aqueous humor, and eventually find their way to the interior eye drainage canals where, over a period of time, the granules will begin to block the canals. Once that happens, the pressure on the interior of the eye will begin to increase. At the point where this pressure begins to cause damage to the optic nerve, the pigment dispersion syndrome has developed into pigmentary glaucoma.
This rare disease occurs in men more so than women, and tends to strike men in their twenties and thirties. In addition, myopic (nearsighted) people seem to be at a slightly higher risk of contracting pigmentary glaucoma than for those having normal vision or are farsighted. Sometimes, the first, and only, signs that the condition is present, comes during or immediately following exercise, such as jumping or jogging, where vision may become temporarily blurred. More often than not though, noticeable symptoms do not occur.
Pigmentary glaucoma is treatable when not too far advanced. Treatment is designed to prevent a further flaking off of the pigment granules, and usually is in the form of eye drops, Optipranlol and Xalatan being two medications commonly prescribed. In addition there is a class of drugs called miotics, which sometimes are called into play. Most of these treatments cause no significant side effects, though incidences of blurred vision sometimes occur which may restrict their use. In recent years, laser surgery has been employed to open the drainage canals and relieve the pressure. Another laser-based treatment is to create a small hole in the iris. This results in the iris moving slightly away from the lens, lessening the chance of pigment dispersion which occurs when lens fibers scrape against the iris.
Other types of glaucoma generally strike in later years, although myopic individuals are still slightly more at risk, and tend to get the disease earlier in life. No matter what one's age is, glaucoma of any type is a threat to one's vision and any problems associated with vision should be promptly looked into.
Learn about tingling tongue, carbs in carrots and other information at the Health And Nutrition Tips site.
Article Source: http://EzineArticles.com/?expert=Jenny_Styles
Friday, October 30, 2009
Intra Ocular Pressure
In an advanced glaucoma, the visual field in the peripheral retina is decreased or lost, leaving only the vision in the central retina (macular area) which is still intact. It is called the “tunnel vision.” The increase in eye pressure occurs when too much aqueous fluid enters the eye and/but not enough of the aqueous fluid is leaving the eye. Eye pressure can be measured using “tonometry” test.
Normally, fluid enters the eye by seeping out of the blood vessels, it occurs in the ciliary body. This fluid if flowing way past the crystalline lens, through the pupil (the central opening in the iris), into the irido-corneal angle, the anatomical angle formed where the iris and the cornea come together. And the fluid passes through the trabecular meshwork in the angle and leaves the eye, via the canal of Schlemm.
If the rate of aqueous fluid entering the eye is too much, or if the trabecular meshwork “drain” gets clogged (for example, with debris or cells) that the fluid is not able to leave the eye quickly enough, the pressure is increasing in what is known as “open angle glaucoma.” It usually occurs naturally with the increasing age.
Open angle glaucoma, which is a chronic and painless condition. It can happen when the posterior portion of the iris, surrounding the pupil, adheres to the anterior surface of the lens (creating a “pupillary block”). This could deter/prevent intraocular fluid from passing through the pupil into the anterior chamber.
However, if the angle between an iris and the cornea is too narrow, or is even closed, then the fluid backs up because it cannot flow out of the eye correctly/normally. This will increase the intraocular pressure which is known as “closed angle glaucoma.” Usually, there is an acute, and sudden painful onset. It might be accompanied by the appearance of rainbow-colored rings around the white lights.
An internal pressure which is more than what the eye can tolerate can deform the lamina cribrosa, the small cartilaginous section of the sclera in the back of the eye through which the optic nerve passes. A deformed lamina cribrosa seems to “pinch” nerve fibers passing though it, it will finally causes axon death. Untreated glaucoma will result in optic atrophy and blindness.
Eye pressure is measured using a “tonometer” (and the test is called “tonometry”), and the standard tonometer generally is considered to be the “Goldmann tonometer.” The normal range of intraocular pressure (IOP) is 10 mm Hg to 21 mm Hg, with an average of about 16 mm Hg. Typically, eyes with intraocular pressure measurements of 21 mm Hg or higher, using a Goldmann tonometer, are considered to be “ocular hypertensive” and it is a possibility of glaucoma.
Although glaucoma is associated with the increase of IOP, the amount of pressure which is causing glaucoma varies from person to person and eye to eye. Many people with glaucoma actually have IOP’s in the normal range (“low tension” glaucoma), and it indicates that their lamina cribrosas are too weak to withstand even the normal amount of pressure. Conversely, some people with IOP’s which is considered to be high have actually no evidence of glaucomatous damage whatsoever.
Glaucomatous changes in the optic disk (optic nerve head) usually can be detected in the long run (over time). If the optic cup within the optic disk increases in size over a period of months or years, if notching is observed anywhere around the nerve head rim, and/or if an asymmetry is observed between the optic cups of the two eyes, then that person can be seen as a “glaucoma suspect.” In glaucoma, optic nerve rim atrophy and/or notching, with a corresponding visual field decrease, usually will occur.
Thursday, October 29, 2009
Laser Eye Surgery Problems - What Are the Risks Involved?
By Jack Worthing
There are many people who think that laser eye surgery is the be all and end all when it comes to solving vision problems. What many people do not know is that many laser eye surgery problems exist and if you are planning to undergo laser treatment for your eyes soon, then you must know the possible laser eye surgery problems that can happen as a result of undergoing this very popular procedure.
Some people think that laser surgery is completely safe, as being promoted by its supporters. It is time that people become aware of the risk involved in this form of treatment so if they ever try it they know what they are getting themselves into.
Below are some of the common laser eye surgery problems that individuals have encountered in the past.
Dry Eyes
This is probably the most common side effect of laser surgery. As the name suggest, having dry eyes means the inability of the eyes to keep themselves moist. This results in irritation and even pain.
The common mode of treatment is to provide external lubrication and moisture to the eyes. Though not really serious, this condition can cause severe discomfort to individuals.
Oversensitivity to Light
Some people who have undergone eye surgery have experienced oversensitivity to light. Suffering from this condition means having difficulties seeing under broad daylight or when exposed to powerful light sources. Driving during the day becomes incredibly difficult for people suffering from oversensitivity to light.
Complete and Irreversible Blindness
The worst thing that can happen to people who will undergo surgery is to completely lose their vision. Laser is a very powerful tool...when used incorrectly, it can cause severe damage to the eyes.
Some people think that laser surgery is completely safe, as being promoted by its supporters. It is time that people become aware of the risk involved in this form of treatment so if they ever try it they know what they are getting themselves into.
Below are some of the common laser eye surgery problems that individuals have encountered in the past.
Dry Eyes
This is probably the most common side effect of laser surgery. As the name suggest, having dry eyes means the inability of the eyes to keep themselves moist. This results in irritation and even pain.
The common mode of treatment is to provide external lubrication and moisture to the eyes. Though not really serious, this condition can cause severe discomfort to individuals.
Oversensitivity to Light
Some people who have undergone eye surgery have experienced oversensitivity to light. Suffering from this condition means having difficulties seeing under broad daylight or when exposed to powerful light sources. Driving during the day becomes incredibly difficult for people suffering from oversensitivity to light.
Complete and Irreversible Blindness
The worst thing that can happen to people who will undergo surgery is to completely lose their vision. Laser is a very powerful tool...when used incorrectly, it can cause severe damage to the eyes.
If you're sick and tired of having to use glasses or contact lenses and can't afford the risk and expense of laser eye surgery, then you'd benefit from a natural way to improve eyesight. Take a look at this simple and easy to use guide that has been used successfully for years to treat eyesight problems naturally ==> How To Improve Eyesight
Article Source: http://EzineArticles.com/?expert=Jack_Worthing
Wednesday, October 28, 2009
Glaucoma
The first symptom is a loss of peripheral vision. Left untreated, this condition can worsen, and lead to complete blindness. Other symptoms is severe eye pain, rainbow vision, blurred vision, headaches and nausea. If you are experiencing one of these, it is important to have a thorough eye exam preformed by an experienced optometrist.
The most common type of glaucoma is open-angle glaucoma, eyesight is lost very slowly over a long period of time. Often unnoticed due to its slow nature, open-angle glaucoma becomes a real threat. Less common is closed-angle glaucoma, in which the iris and lens of the eye prevent fluid movement between the layers. Congenital glaucoma, the rarest form, is developed in the womb. All three types of glaucoma are treatable if caught in time, but damage that has been done to the optic nerve cannot be reversed.
Further damage to the optic nerve can be prevented using various treatments. Pills, eye drops, and laser surgery options exist that can reduce or prevent future damage from occurring to the optical nerve. But care and cautious attitude towards the side effect of these procedures and treatments are also important. In addition, glasses, contact lenses, and even some surgeries can help restore your vision to its natural way of seeing things.
If you are experiencing any of the symptoms of glaucoma, please go and visit your experienced eye doctors at the Eye Clinic right away.
Tuesday, October 27, 2009
The 2 Best Eye Exercises - Improve Vision and Correct Vision Defects Naturally
By Samantha Land
Our eyes allow us to visualize and process images in our brain. This is why eye care is so important, but sometimes we forget how valuable our eyes are. We put a lot of stress and strain on our eyes which causes them to go bad.
When they do go bad many people turn to eye glasses, contact lenses, or even surgery to improve their vision. However some people don't like wearing glasses, some people consider contact lenses to be too uncomfortable, and others are too scared to even think of trying eye surgery.
Thankfully, a number of eye exercises have been developed over the years and they have helped a number of people to improve their vision naturally. Not only do eye exercises help you develop a better vision, but they can also help you correct vision defects as well.
One of these eye exercises you can start performing to improve your vision will only take about 3 minutes of your time. First you need to get in a comfortable position and it doesn't matter if you stand or sit. Now position your thumb about 10 inches from your face and focus on it. Now switch your focus on something else about 20 feet in front of you. Every time you take a deep breath you should switch your focus between both your thumb and the object 20 feet in front of you. This eye exercise will make the muscles in your eyes stronger over time and improve your overall vision.
Another well known eye exercise to improve your vision is referred to as palming. To perform this exercise you first need to take a few deep breaths. Now take the cup of your palm and use it to cover your closed eyes. Your fingers should be on your forehead and the heel of your hand should be resting on your cheekbone. You should be applying moderate pressure so your eyes can still blink freely. Palming is designed to relieve the stress around the eyes and relax them.
These eye exercises may not seem like much but they can make a huge difference. The best part about these eye exercises is the fact that they will only take a few minutes to perform them and you can perform them anywhere.
When they do go bad many people turn to eye glasses, contact lenses, or even surgery to improve their vision. However some people don't like wearing glasses, some people consider contact lenses to be too uncomfortable, and others are too scared to even think of trying eye surgery.
Thankfully, a number of eye exercises have been developed over the years and they have helped a number of people to improve their vision naturally. Not only do eye exercises help you develop a better vision, but they can also help you correct vision defects as well.
One of these eye exercises you can start performing to improve your vision will only take about 3 minutes of your time. First you need to get in a comfortable position and it doesn't matter if you stand or sit. Now position your thumb about 10 inches from your face and focus on it. Now switch your focus on something else about 20 feet in front of you. Every time you take a deep breath you should switch your focus between both your thumb and the object 20 feet in front of you. This eye exercise will make the muscles in your eyes stronger over time and improve your overall vision.
Another well known eye exercise to improve your vision is referred to as palming. To perform this exercise you first need to take a few deep breaths. Now take the cup of your palm and use it to cover your closed eyes. Your fingers should be on your forehead and the heel of your hand should be resting on your cheekbone. You should be applying moderate pressure so your eyes can still blink freely. Palming is designed to relieve the stress around the eyes and relax them.
These eye exercises may not seem like much but they can make a huge difference. The best part about these eye exercises is the fact that they will only take a few minutes to perform them and you can perform them anywhere.
You can easily have the eyesight you desire using these natural techniques. Don't settle for glasses or contact lenses, and don't take a chance on your eyes with expensive and risky eye surgery.
Discover How To Improve Eyesight Naturally using all natural techniques which have been medically proven to improve your eyesight within a few weeks.
If your serious about improving your eyesight permanently and safely => Click Here.
Discover How To Improve Eyesight Naturally using all natural techniques which have been medically proven to improve your eyesight within a few weeks.
If your serious about improving your eyesight permanently and safely => Click Here.
Article Source: http://EzineArticles.com/?expert=Samantha_Land
Monday, October 26, 2009
How Daydreaming Improves Your Eyesight
By Katie Chan
There's an interesting group of sea gypsies living off the Burmese archipelago. They live half of their life on ships and therefore often dive into the sea to catch food and even pearls.
What's interesting about these people is that they can dive deep into the sea - as much as 75 feet deep - without any diving equipment. If you know a little something about diving, then you would know that it's "impossible" to dive that deep without equipment.
For one, the amount of water would shift light rays in such a way that it would not land properly onto the retina - which means you wouldn't be able to see at all.
But these sea gypsies were able to see that deep in the ocean. Scientists have always assumed that the expansion of our pupil in the sea is a reflexive reaction - but these sea gypsies contracted their pupils instead of expanded them.
How could that be?
This is but one of the many examples how our brain can adapt our eyes to see what it couldn't before. What has this got to do with you?
Fact is, your brain couldn't tell the difference between reality and daydreaming. The same neurons would fire when you see and when you imagine. Therefore imagination plays a big role in improving your eyesight. All you have to do is imagine yourself being able to see clearly without your glasses and your brain will shift its neuronal links to suit your needs.
What's interesting about these people is that they can dive deep into the sea - as much as 75 feet deep - without any diving equipment. If you know a little something about diving, then you would know that it's "impossible" to dive that deep without equipment.
For one, the amount of water would shift light rays in such a way that it would not land properly onto the retina - which means you wouldn't be able to see at all.
But these sea gypsies were able to see that deep in the ocean. Scientists have always assumed that the expansion of our pupil in the sea is a reflexive reaction - but these sea gypsies contracted their pupils instead of expanded them.
How could that be?
This is but one of the many examples how our brain can adapt our eyes to see what it couldn't before. What has this got to do with you?
Fact is, your brain couldn't tell the difference between reality and daydreaming. The same neurons would fire when you see and when you imagine. Therefore imagination plays a big role in improving your eyesight. All you have to do is imagine yourself being able to see clearly without your glasses and your brain will shift its neuronal links to suit your needs.
If you like this article, you might want to join my "Perfect Vision For Life Newsletter" for free at Rebuild Your Vision - An offer available only to my EzineArticles readers.
For more articles on eye exercises, please visit my blog where I share more information on good vision habits, eye exercises and supplements I used to get rid of my glasses after having worn them for more than 15 years.
For more articles on eye exercises, please visit my blog where I share more information on good vision habits, eye exercises and supplements I used to get rid of my glasses after having worn them for more than 15 years.
Article Source: http://EzineArticles.com/?expert=Katie_Chan
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