These RK patients do have corneal issues 10 plus years later. Their corneas often display a brownish line in the bottom half indicating iron left behind when the endothelial pump removes fluid from the cornea. In addition, most of these patients are far sighted with astigmatism and their prescription gets stronger later in the day. This makes it difficult to have an accurate eye glass prescription. Weakness of the cornea also increases the risk of corneal rupture when exposed to trauma.

LASIK and PRK do not flatten out the entire width of the cornea thus leaving the endothelial layer intact. This does not affect the pump or the functioning of the physiology of the corneal tissue. Therefore negative corneal changes that are displayed in RK patients should not occur in the LASIK and PRK patients.

According to an article published in the November issue of the Archives of Ophthalmology, there are no long term destructive corneal effects following LASIK and PRK. The study examined 29 myopic LASIK and PRK patients 9 years after the surgery and found them to display no abnormal changes. There was a 5.3% decrease in the endothelial cell density which corresponds to a normal cell decrease in individuals that never had the refractive procedure.

While the study did not examine far sighted post operative patients, they concluded that the results would be similar to the near sighted patients. Whereas post operative RK patients displayed corneal changes after 5 years, the LASIK and PRK patients did not show any signs after 9 years. Further studies must be conducted at longer post op intervals to fully examine the long term effects, but this initial study is very encouraging.

Dr. Jay B Stockman is a practicing doctor for http://newyorkvisionassociates.com, and a contributing expert for VisionUpdate.

Article Source:http://www.articlesbase.com/vision-articles/long-term-effects-of-lasik-and-prk-are-encouraging-1678212.html

Before that, it is very essential to know some concepts. Of which, farsightedness comes first. Many people can not tell nearsightedness and farsightedness from each other, though most of them are glasses wearers. In fact, just as their names imply, the two words vary in term of visual distance.

If you can only see objects that are very near to you, you might be nearsighted. Contrarily, if you can only see objects that are very far from you, you might be farsighted. Technologically, LASIK surgery can be employed on people with any one of the two abovementioned conditions. But this surgery is not very suitable for some very few farsighted people.

Obviously, farsightedness surgery involved with LASIK is relatively complicated. The renewal of technologies has assured that lasers can be employed on eyes of various conditions. The deformed cornea will be standardized by lasers into normal shape. The moment you finished the surgery, you can open your eyes and see objects around you clearly as common people do. This might be a good answer to deplete people’s doubt -whether LASIK surgery can be used for farsighted people. If you are now farsighted, just go and receive LASIK surgery and it can assure you a bright world of happiness.

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There is a list of compiled complications of Lasik surgery.

1. It causes dryness of the eye. Experiencing dry eye is the most frequent complication related to Lasik. Even The US Food and Drug Administration warns about permanently experiencing dry eyes.  
2. It results to visual quality loss. Some Lasik patients were reported to experience trouble seeing details in dim lights. At times, some even experience visual distortions.
3. After Lasik, the cornea isn’t capable of complete healing. It is reported to weaken one’s cornea because of damaging collagen bands which provide protection to the eye.
4. Long term consequences are associated with Lasik surgery. Lasik patients are prone to cataracts. As such, patients are more exposed to undergoing repeat cataract surgeries.
5. It isn’t advisable for patients to undergo bilateral simultaneous Lasik surgery. The surgery being performed on the same day puts the patients at risk of vision loss in both eyes.
6. After Lasik, there are more serious complications which may arise. There were several after-Lasik complications reported such as inflammation resulting in corneal haze, flap dislocation and retinal detachment. 
7. It doesn’t completely remove the need for glasses. Still, Lasik does not ensure getting rid of reading eyeglasses by the time patients reach the age of 40. As the effectiveness of Lasik decreases each year, Lasik patients are more likely to use eyeglasses again. 
8. Until now, the real result of Lasik complications is not fully determined. It was recorded that FDA allowed Lasik manufacturers not to disclose the results of clinical trials. 
9. After Lasik, treatment options are limited. Lasik treatments are permanent and unalterable.
10. There are still safer options instead of Lasik. Eyeglasses and contact lens are still the safest methods to improve vision.

At present, the Food and Drug Administration is conducting a study which aims to determine the number of patients who experience the harmful effects which Lasik Surgery may cause. It is expected to be completed by 2012. Just recently, FDA sent out warning letters to 17 Lasik surgery centers for not giving full reports on the unfavorable effects of Lasik. Because of the reported negative after-effects by some Lasik patients, FDA will undergo a series of inspections to some centers for monitoring.

The price of Lasik ranges from $1000 to $5000 today. It is rather expensive. However, there are several Lasik financing options available, which is not a common knowledge. Generally, there is a very high percentage of the number of patients satisfied with the Lasik result. You must contact an ophthalmologist if you believe you are ready and able to undergo the Lasik procedure.

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Have you ever thought that you could improve eyesight naturally?  Were you aware that you can improve eyesight just by changing a few habits?  We are much harder on our eyes then we think.  If we were to take the time to learn and practice some relaxation exercises, we could start seeing more clearly.  Some people think that just because they have worn glasses for years or have some type of eye disease that they can’t learn to improve their eyesight naturally.   It depends on how severe the eye disease is, but under normal circumstances, your eyesight can improve.

The main causes for poor eyesight are stress and strain.  We are all born with relatively good eyesight.  We start learning bad habits throughout our school years.  Like sitting in a classroom staring at the blackboard, our books or papers.  This causes strain on our eyes which leaves them tired and stressed.  There is little to no time between classes where we can relax the eyes and give them the rest they require.  Because we learn these habits at such a young age, they are carried over into our adult lives.  From there we do the same things at work staring at our computers, working on paperwork or stressing over a deadline.

Are you aware of the signals your body relays when you need rest?  For instance when you spend too much time doing household chores and your back starts to hurt.  The same goes for the eyes.  Like when your head starts to hurt or your eyes start to burn.  Those are the signals that it’s time to take a break.  If you are able, lie down and just relax for a few minutes.  If you aren’t able to lie down, find a quiet place to relax your mind and close your eyes.  They need to be re-energized.

We can all prevent poor eyesight.  If we take the steps today and develop the necessary habits that will improve our eyesight, we will be better off for the rest of our lives.

Adrienne Smith is a work at home business owner and she enjoys helping others find the same success.

Having had poor eyesight herself from many hours of computer work, she was thrilled to learn of these amazing methods that have improved her eyesight. If you would like to learn more about the methods mentioned above, please be sure to visit Vision Without Glasses today.

Article Source:http://www.articlesbase.com/vision-articles/how-to-improve-eyesight-naturally-1079965.html