Posts Tagged ‘corneal tissue’

How to Relieve Dry Eye Caused By Lasik Surgery

Dry eye is a common eye problem, and there are many causes of dry eyes, one of which is the postoperative side effect of Lasik surgery. In normal circumstances, Lasik surgery, some studies show that, is one of the main causes of dry eye, although sometimes certain people seem to experience no dry eye symptoms.

Reasons why Lasik surgery leads to dry eye are as follows. In the process of a Lasik procedure, there must be a corneal flap created by either a steel blade or a laser, during which the corneal tissue and corneal nerves are supposed to be broken up. What is more, the following reshaping of corneal by laser will come to further disrupt the nerve tissue. If the patient suffer from a comparatively more seriously eyesight problem, the nerve tissue is thought to be cut deeper, which does more side effect to eyes. Then due to the whole disruption, the nerve tissue, when recovering and regenerating, is normally hard to produce tears to keep eyes moistened. Thus dry eye symptoms emerge.

( What is more, for supplement only, whether the corneal surface and tear lay are created to be qualified or smooth is closely related to another eyesight problem of “ghosting” and “fuzziness”, as when light comes into eyes, it meet with the tear layer at the very first. If the corneal surface or tear layer is of irregularity and deficiency, visual acuity will be greatly affected.)

As a surgeon, considering the possible side effects of dry eyes, and ghosting or fuzziness images creation, I advise several ways to minimize those possibilities after operation: have an overall examination concerning eyes, including the evaluation of preexisting dry problems; apply the Intralase FS lasers, but not the steel razor blade microkeratome to create the corneal flap, which is believed to be more able to minimize unsmooth and unqualified corneal surface and tear layer; after the surgery, use artificial tears and gel lubricants for a series of days. Those who do not have the experience of dry eyes after lasik surgery are also suggested to. The cyclosporine 0.05% eye drops (Restasis) are recommended.

It has been researched that the above regimens are able to relieve dry eyes, as well as other eye problem after Lasik surgery. By persisting in the regimens, improvement of eyesight, but also the prevention from secondary side effects can be guaranteed. Besides, get more information of Lasik surgery in advance is also helpful to enhance the outcomes.

more info

·Dry eye causes and treatments

·Flaxseed oil for dry eye treatment

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Article Source:http://www.articlesbase.com/vision-articles/how-to-relieve-dry-eye-caused-by-lasik-surgery-1697531.html

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Long Term Effects of LASIK and PRK Are Encouraging

The long term side effects of refractive surgery have been a concern for all patients and doctors alike. When Radial Keratotomy(RK) was being performed; there were many unknowns. Flattening the corneas with radial corneal incisions stretched the endothelial layer decreasing its’ ability to pump water out of the cornea. While most RK surgeons were not worried about the long term corneal hydration, questions did remain as to what would occur years after the procedure.

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

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Potential Lasik Complications Can Arise From Laser Eye Surgery

Laser eye surgery has arrive a long way from the early days of the treatment. But regardless of a large deal of think about being taken by surgeries to make it a protected method, difficulties can still arise.

The most general type of laser eye surgery is LASIK, but all types are voted for out by a laser which reshapes the cornea and eliminates some corneal tissue to change the focussing power of the eye.

People must take probable complications into consideration and make an acquainted conclusion about whether to get laser eye surgery.

Major Complications asoociated with Laser Eye Surgery Flap Damage or Loss

Instead of conceiving a hinged flap of tissue on the centered cornea, the whole flap could arrive off. If this were to happen it could be restored after the laser treatment. However, there is a risk that the flap could be impaired or lost.

Distorted Flap

Irregular healing of the corneal flap could conceive a garbled corneal form, producing in a decline of best-corrected vision. It should be documented that whereas difficulties of laser eye surgery are uncommon your surgeon should announce you about them former to treatment

Double Vision

Two images emerge when looking through one eye at a time.

Time Glare

Headlight glare when going by car at night.

Night Myopia

This is a inclination for eyes to become more nearsighted at evening, premier to blurry vision. This can be amended by wearing crystal with minus lenses in the dark

Halos and starbursts

This happens when the student enlarges after the treated locality at nighttime.

Vision Blurring

This is when images emerge blurrier after the refractive surgery than before.

Flap Melt

The flap starts to disintegrate and may need surgical intervention.

Flap Dislocation

This is a status in which the corneal flap is not in correct alignment in the corneal bed. This is treated with surgical intervention.

Flap Wrinkles

A foremost or secondary flap dislocation makes flap wrinkles. This is treated with surgical intervention. This is all about complications associated with Laser Eye Surgery. Hope this will help you a lot. Cheers!

Andrew White is a eye care assistant and an expert on eye cure and care, laser eye surgery, lasik eye surgery and other types of eye surgeries. For more information on how to get rid of eye problems visit our website.

Article Source:http://www.articlesbase.com/vision-articles/potential-lasik-complications-can-arise-from-laser-eye-surgery-1656157.html

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Refractive Laser Surgery

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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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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