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The Lasik Blog

Welcome to the LASIK Blog, a resource for people interested in LASIK surgery. This consumer-friendly blog is intended to be used as a central resource to answer common questions about LASIK and to point you in the right direction.

Monday, October 06, 2008

LASIK Works on Dogs Too!

So you thought LASIK was only for humans. Well think again. Eye surgery can be used to improve the quality of your pet's life as well.

Recently, a dog in India successfully underwent cataract surgery in one of its eyes. The dog, a 13-year-old Pomeranian, was always bumping into things at home. When its owner took it to the vet, the dog was diagnosed with cataract in both eyes.

Last week, an ophthalmologist surgically corrected the cataract in the dog's right eye. He removed the affected lens and repaired an intra-ocular lens. The dog received an anesthetic during the procedure and was able to go home with its owner that day. Next month, the dog will go back to the ophthalmologist to correct the cataract in its left eye.

The dog has already returned to its normal routine and is running around the house the way he always does. It seems that the surgery was extremely successful.

The most common causes of cataract problems in dogs are diabetes and old age.

Interestingly, this isn't the first time eye surgery has been performed on a dog. Recently, there were two other dogs from the same Indian town that went through similar procedures.

Thursday, October 02, 2008

FDA Gets Tough on Unapproved Eye Meds

The FDA is starting to crack down on drug companies that are marketing unapproved eye medication. In particular, they are focusing on companies that are marketing unapproved ophthalmic balanced salt solutions and unapproved topical drugs made with papain. Drug companies have until November 24, 2008 to stop manufacturing these products and until January 21, 2009 to have them off the market. After these dates, the FDA will take action against the drug companies.

Both of these products have been found to have serious health consequences for people who have taken them.

Ophthalmic balanced salt solutions are used during cataract surgery to irrigate the eye. Injuries stemming from the use of unapproved versions of this solution include eye inflammation, cloudy vision, and permanent loss of visual acuity. The only companies that have received FDA approval for their balanced salt solutions are Alcon and Akorn.

Topical drug ointments made with papain have been used for the purpose of removing dead or contaminated tissue in acute and chronic lesions. Unapproved versions of this product have been found to cause hypersensitivity reactions resulting in low blood pressure and rapid heart rate. The FDA has approved this product from the following companies: Accuzyme, Allanfil, Allanzyme, Ethezyme, Gladase, Kovia, Panafil, Pap Urea, and Ziox.

If you are considering eye surgery to correct your vision problems, you can use the links at the bottom of this page to find a qualified ophthalmologist in your area.

Monday, September 29, 2008

What to Expect from Your LASIK Preoperative Visit

In order to be approved for LASIK surgery, your eye doctor will need to conduct a very thorough examination at your preoperative visit. The purpose of this examination is two-fold: first, your doctor must make sure you are a strong candidate for surgery. Second, if he determines you are in fact a good candidate, he will need to take certain measurements of your eye to help determine which LASIK procedure is right for you.

In order to be considered an ideal candidate for LASIK, you must meet certain criteria. Most importantly, your vision must lie within the acceptable correction range, and your prescription must have remained fairly stable over the past two years.

Your cornea also must have a total thickness exceeding 500 microns. This is important because the LASIK procedure removes part of your cornea in the reshaping process. It is essential that your cornea is thick enough to ensure that you have a sufficient layer remaining after the surgery.

Your pupil diameter should also not exceed 6.5 mm. This is important because pupils larger than this can lead to post-op complications, such as halos and glare during night vision.

If your eye surgeon determines that you meet the above criteria, he will then conduct a thorough examination of your eyes to determine the correct course of action for your surgery. As LASIK technology advances, there are a growing number of surgical options that cater to the specific needs of your individual eye issues.

Your doctor will use a machine called a phoropter to check your prescription. If you have ever gone to the eye doctor to take an eye exam, you are familiar with this device. You rest your eyes on this machine and focus on an eye chart across the room while your doctor uses different combinations of lenses to determine your prescription.

Your doctor will also examine the surface of your cornea using a dye called Fluoracaine. This dye will cause your cornea to glow under blue light, enabling your doctor to look for irregularities in your cornea. Detecting any irregularities in your cornea is crucial to the surgical process, since LASIK uses a laser to shave off a portion of your cornea.

If you are interested in considering LASIK surgery to correct your vision problems, you can use the links at the bottom of this page to find a qualified ophthalmologist in your area.

Friday, September 26, 2008

LASIK Surgery: Good For Linda Lusardi and Maybe for You


 

Linda Lusardi, a British model and actress who was voted the best Page Three Girl Ever in 2005 by readers of the tabloid The Sun, is unlike many of her cohorts in that she has never had any cosmetic surgery. She credits her ongoing good looks to a healthy lifestyle. The only elective surgery she has ever had is LASIK surgery, and even this she almost didn't have.


 

She recalls, "I had to wear thick glasses for reading and my eyes were so bad I was turned down when I first asked about [LASIK]." But one of the remarkable qualities of laser refractive surgeries is that it continues to change and improve. Just as PRK was replaced by LASIK, which was improved by Custom LASIK, intraLASIK, and even LASEK, the LASIK procedure continues to evolve, and one of the main features of its continued evolution is that people who could not have LASIK in the past can have it now.


 

Earlier this month, Lusardi went to a LASIK clinic and was treated. Although she was scared at first, she said, "the results were amazing." Lusardi's story is instructive. If you have been evaluated for LASIK surgery but told that you were not eligible, things may have changed, and you should be re-evaluated for candidacy.


 

If you are interested in LASIK in Dallas, Texas, contact the Carter Eye Center today to schedule a LASIK consultation.

Monday, September 15, 2008

Should Multifocal IOLs Be Covered by Medicare?

Cataract surgery involves the replacement of a clouded natural lens with a clear plastic one, known as an intra-ocular lens (IOL). As we age, the proteins in the lens degrade, which leads the clouding, and there is no way to restore clarity to the lens once clouded. The only solution available, therefore, is to replace the clouded lens with an artificial one that does not face the risk of clouding. Traditionally, monofocal IOLs--lenses focused at a particular distance--were used because technology did not exist to make lenses that could allow the eye to accommodate, or focus, at different distances. Because cataracts can lead to near-blindness in sufferers, cataract surgery is considered medically necessary and is covered by Medicare.

Now, multifocal IOLs, artificial lenses that allow the eye to focus at different distances, are available for use. The goal is to free people who have undergone cataract surgery from the need to wear glasses in order to see clearly at any distance other than the one determined for their monofocal IOL. Many patients with multifocal IOLs, such as the ReSTOR or ReZOOM lenses, are able to drive, read, and perform many other tasks without resorting to the use of glasses.

However, these new lenses are more expensive than the older monofocal IOLs, and Medicare considers the choice for a multifocal IOL to be an indulgence, so it does not cover them. But should it? Medicare part B pays for glasses following cataract surgery. The majority of people who have multifocal IOLs do not need glasses most of the time, making it reasonable for Medicare to drop the coverage of eyeglasses if it covers the multifocal IOL. Although not a perfect trade-off for the government in terms of cost, it is not so dramatic a cost difference as it seems, and if the price of multifocal IOLs continues to come down, we may see the two options leveling out. Covering both would allow patients to choose the lens right for them following cataract surgery.

If you are interested in receiving multifocal IOLs following your cataract surgery, contact us today to schedule a multifocal IOL consultation with a local cataract surgeon.

Tuesday, September 02, 2008

FDA Seeking Comments on Excimer Ban Petition

The Food and Drug Administration (FDA) has received a petition to ban the use of excimer lasers for refractive surgery purposes. The citizens' petition was filed by the owner of lasikdisaster.com, and claims that "substantial deception in the labeling and an unreasonable and substantial risk of injury" represent sufficient grounds to ban the lasers.

The petition is not associated with the FDA's comprehensive investigation into the negative consequences of LASIK, including the psychological consequences of failed LASIK.

The FDA welcomes comments on the petition, which can be read online. Persons with a strongly positive or negative experience with LASIK surgery are encouraged to comment, since the FDA will consider all comments in evaluating the viability of the proposed ban.

Proponents of LASIK and related refractive surgeries claim the ban is uncalled-for. Glenn Hagele, executive director of the Council for Refractive Surgery Quality Assurance (CRSQA), says, "The suggestion that LASIK should be banned is not supported by science and ignores the vastly positive comments reported to the FDA" by his organization. In a CRSQA survey, 99 % of patients reported that their quality of life after laser vision correction is as good or better than expected, although 2 % report that complications from the procedure are frequently or always problematic (revealing that about 1 % of laser vision correction patients are very pessimistic.)

Laser vision correction is by far one of the most successful surgeries available, but there are a number of people who have experienced serious adverse effects. If you have had a positive or negative experience with laser vision correction, you are encouraged to respond to the petition.

Tuesday, August 26, 2008

Implanting an Artificial Eye?

Plans are afoot in some research centers to create a biocompatible artificial eye. The National Science Foundation has a webpage where you can see the current model and watch video explanations of how it is constructed.

The challenge being worked on at this time is using planar electronics, which up till now have only been functional on a flat surface, on a round surface like the human eye. Researchers at the University of Illinois at Urbana-Champaign and at Northwestern University at Evanston, Illinois, have an electronic eye camera which has the same shape and dimensions as a human eye.

A Working Model

It has a clear "cornea" in front, with a lens behind that, and it sits on a small electronic board connected to a computer. It has 256 silicon photodetector pixels all connected by tiny wires which allow the entire surface to be curved without threatening to damage the silicon. It "takes pictures", or "obtains images" of what is around it.

It is basically like a digital camera except that it is on a curved surface. This curvature enables it to capture images in a similar way to the human eye, yielding "photos" superior in some ways to the flat photos we are familiar with.

It uses established materials rather than any new proprietary materials, and standard manufacturing processes. The researchers are therefore expecting that before very long, another model will be made with more than 256 pixels. That would be a higher density of pixels, since the dimensions of the "eye" would remain those of the human eye. A higher pixel density would yield more fine detail in its images.

The researchers are collaborating with others to explore how this type of technology could be used in healthcare monitors, therapeutic systems, and prosthetic devices such as artificial eyes.

Please see our article on How the Eye Works for more information.

If you would like to get help for your own vision, you can use the links at the base of this page to find an experienced and fully-qualified ophthalmologist in your area. For tips on how to choose a good ophthalmologist, you can read our article on How to Find an Eye Surgeon Near You.

 
Click on a link to find a LASIK surgeon in that state.

Disclaimer: The information on this website about LASIK is for informational purposes only. To determine the risks and benefits of LASIK in your specific situation, please schedule an appointment with a LASIK surgeon.