Archive for the ‘visx lasik’ Category
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We live in a time of seemingly endless innovation and rapid technological progress. It is hard enough to keep up on the latest e-mail filters and cell phone video cameras, much less such specialized medical procedures as LASIK eye surgery. But if you are considering laser vision correction of any kind—the popular and effective LASIK procedure or, if you are not a good candidate for that, an alternative such as LASEK or PRK—then it is no longer just a matter of passing interest. It is your responsibility to be an informed, prepared patient for any kind of surgery, so you need to learn the latest on LASIK technology used in LASIK eye surgeries as part of that preparation. The best doctors and clinics want to ensure the very best possible results for their LASIK eye surgery patients, which often means having not one but several different kinds of equipment. There are technologies that are more appropriate for some patient conditions than others, which is why many practices are equipped with several examples of the latest equipment available. There are at least five or six kinds of laser eye surgery equipment being used widely in the field today, and others are being developed all the time. Medical research and technology continues to make breakthroughs that improve and maintain people’s quality of life, and the last few years have been particularly good ones for advances in LASIK treatment. The WaveScan™ Wavefront® System used by many specialists in LASIK eye surgery works by creating a “map” that shows how your optical system, as a whole, processes perceived light. This results in something akin to a “fingerprint” of each eye’s unique vision profile, meaning that each of your eyes can be treated for their own special imperfections during the LASIK eye surgery. The VISX® Star S4™ laser, according to many of its proponents, brings a new standard of accuracy to laser vision correction with a combination of two different systems known as Variable Spot Scanning and 3D ActiveTrak®. With a laser calibrated to .25 microns, this hybrid system offers astonishing precision, and can treat many borderline conditions that were once beyond the scope of other technologies. (For comparison, human hairs are 60-80 microns in diameter.) CustomVue™ systems match a specially created profile (again, a kind of “fingerprint”) of your vision to an “ideal” optical system. Once again using the VISX® Star S4™ laser, this profile data ensures precise, uniquely personalized LASIK eye surgery. If you are one of the particular LASIK patients who qualify for this kind of procedure, CustomVue™ allows the surgeon to eliminate microscopic flaws in your vision that cannot be corrected with either glasses or contact lenses. One of the newest developments on the LASIK eye surgery scene is the IntraLase® laser. It uses a special technology and method for creating the corneal flap required in laser vision correction surgery. Replacing a standard metal blade, the IntraLase® laser produces a very precise flap. Monica Keller
Prior to surgery, my glasses could correct my vision to a point somewhere between 20/40 and 20/50. Just outside the DMV requirements for getting a Driver’s License. At the one-day postoperative exam, I tested at 20/30 in one eye, and 20/40 in the other. I’m now 11 days post-LASIK and I couldn’t be happier. My visual acuity has gradually improved, to the point I think both eyes are around the 20/30 range. For me, a nystagmus patient with optic nerve hypoplasia, this is the best I’ve ever seen in my LIFE! Even better than with RGP contact lenses (which I could not tolerate). my ONLY visual side-effect has been a haze or halo around bright light sources at night, but that is already starting to decrease. No pain or discomfort whatsoever, no starbursts, no double-vision, etc. Recovery has been a dream. I use my rewetting drops religiously, Refresh Plus during the day, and Refresh Celluvisc gel drops at night. I’ve also been keen on maintaining proper hydration from the inside, by drinking plenty of water starting a couple weeks before surgery. I think it’s all helped the recovery process a lot. Duration : 0:9:47
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What Can Lasik Do For You? Glenn Kawesch: According to the Summary of FDA Nearsighted LASIK Results (source: www.fda.gov), the Bausch & Lomb laser has an 87.3% success rate for 20/20 vision without glasses after six months. That same study showed the autonomous laser at 56.9%, VISX at 54.1%, and the Nidek at 47.4%. The minimum vision standard for playing sports without protective eyewear or driving an automobile is 20/40. The 20/40 results for the FDA tests are as follows: Bausch & Lomb, 99.7, autonomous, 93.7, VISX, 95.4, and Nidek, 84.4. Safety data for this test is measured by loss of >=2 lines of best possible vision with glasses. The lower the number, the better the results. Those tests produced these results: Bausch & Lomb, 0.3%, autonomous, 1.2%, VISX, 0.4% Nidek, 0.9% What Are The Goals Of Lasik Surgery? Glenn Kawesch: The goal of LASIK is to reduce or eliminate your dependence on corrective lenses. By improving the uncorrected vision in patients, LASIK allows patients to go about their daily routine and enjoy life without the need for corrective lenses. How Does Lasik Treat Nearsightedness and Farsightedness? Glenn Kawesch: Your eye is anesthetized with eye drops (injections are not necessary). We then use a precise motorized instrument called a microkeratome to create a hinged flap of tissue on the center of the cornea. This flap of tissue is lifted back and the excimer laser is used to sculpt a new flatter surface under this flap. For farsightedness, the laser sculpts a new steeper surface. The flap is then replaced and adheres without requiring any stitches. People sit up from their procedure and can see better immediately. What is No-Cut Lasik? Glenn Kawesch: At Custom Laser Center, we’re happy to also offer Epi-LASIK, the no-cut LASIK eye surgery procedure. The difference between LASIK and Epi-LASIK is that Epi-LASIK involves no blades or alcohol in the procedure. Epi-LASIK is a less abrasive procedure that many find preferable to traditional LASIK eye surgery. With Epi-LASIK eye surgery, available at our Los Angeles and San Diego offices, a doctor can significantly reduce recovery time. Epi-LASIK is especially recommended for those who have extremely sensitive eyes and are concerned with the effects of putting alcohol on their eyes, or having an incision made. Another benefit of Epi-LASIK is that it’s an outpatient procedure. Since we numb your eyes with anesthetic drops, there will be no pain, no needles, and no injections. Epi-LASIK takes only seconds, and you’ll be able to see right away. What is Wavefront, or Custom Lasik? Glenn Kawesch: Corneas are like fingerprints, just as unique and intricate. They have lumps, bumps, ridges and grooves. These shapes create distortions that can’t be treated with glasses or contacts. Even some standard LASIK treatments can only correct so much. That’s why Custom Laser Center employs a device called a Wavefront Analyzer, which sends multiple parallel beams of light into the eye. These beams get distorted as they bounce through the cornea, off the retina, and back again. These distortions are registered by the analyzer and used to direct the laser specifically to those areas causing them. These distortions are then targeted and corrected, frequently resulting in better than 20/20 vision. What About Astigmatism? Glenn Kawesch: The excimer laser can be programmed to treat astigmatism in addition to nearsightedness and farsightedness. These are treated simultaneously. Is There Any Pain? Glenn Kawesch: The surgery is generally painless. Most patients report a pressure sensation during the procedure. After the surgery, there may be some discomfort for 12 to 24 hours, which may be relieved by oral medications for pain and sleep. How Long Does The Procedure Take? Glenn Kawesch: The actual procedure time is between five and fifteen minutes. You will be with us for about one hour. How Long Is The Eye Patched? Glenn Kawesch: Generally, a protective plastic shield is placed over it for 24 hours. You will be seen the next day; you will wear the shields at night for one week. Are Both Eyes Done At The Same Time? Glenn Kawesch: Since most patients notice improved vision almost immediately after LASIK we are able to operate on both eyes at the same time. While some patients elect to have one eye treated at a time, most of our patients choose to have them both done at the same time. How Does The Doctor Know How Much Surgery To Do? Glenn Kawesch: The doctor will program the amount of correction needed in your eyes into a computer which will control the pattern that the laser sculpts. The laser is accurate to the level of .25 microns! Do I Need To Take Time Off From Work? Glenn Kawesch: Usually not. Most of our patients return to work the following day. The visual results of LASIK surgery are nearly instantaneous, with clear vision usually present within hours. In some cases, it may be necessary to skip one day of work. In rare instances, more time off may be required. Can My Vision Return To Its Original Level After Surgery? Glenn Kawesch: There have been no reports on regression of effect following LASIK surgery. What Are The Side Effects of Lasik? Glenn Kawesch: The most common side effects are light sensitivity, and halos, which are usually short lived. Under correction or over correction may occur, and glasses may be needed after surgery to restore perfect vision. Some patients may benefit from a “touch-up” procedure several months after the LASIK to achieve best results. In rare instances, irregular corneal curvatures might be created and glasses may not restore perfect vision. A more detailed discussion of these issues will take place during your Comprehensive Eye Examination. Will I Ever Need Glasses Again? Glenn Kawesch: Usually not for distance vision, although some patients may still require thinner glasses for fine tuning. When you are in the age range where bifocals or “readers” are normally required for close vision (usually ages 40-45 and beyond), you will probably need reading glasses. This is a natural process known as presbyopia. Are There Any Long-Term Side Effects? Glenn Kawesch: The surgery has been performed in this country for approximately five years, and no long-term effects have yet been discovered. Remember that the technique is based on keratomileusis which has been around over thirty years. Top How Old Do I Have To Be For Lasik Surgery? Glenn Kawesch: The doctor would prefer patients to be at least 18 years old, with a stable prescription. There is no upper age limit. What If I Am Currently Wearing Contact Lenses? Glenn Kawesch: When you schedule a Comprehensive Eye Examination, it is important to note the following: if you are wearing hard or gas permeable contact lenses, they must be out of your eyes at least two weeks prior to your surgery. Soft lenses must be out for at least 24 hours. Also, bring in your glasses if available. What Are The Advantages Of Lasik Compared To Contact Lenses? Glenn Kawesch: LASIK offers a permanent improvement of your vision. LASIK does not necessitate years of expense and hassles. LASIK does not deprive the cornea of oxygen. LASIK does not cause allergies and red eyes. LASIK allows you the freedom to see more clearly without visual devices. These are just some of the numerous advantages. Glenn Kawesch |
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Nancy was a LASIK canidate despite her very high myopia, -10 D, because her cornea was thick enough and we used the Intralase which allowed us to create a thin flap and a Visx laser which removes less tissue. Most patiens above -10 D are better candidates for the Staar Visian (ICL) implant rather than LASIK
LASIK flaps created with the Ziemer LDV Femtolaser (”Z-LASIK”) have reliable and accurate thicknesses. This video shows flap creation through the microscope of a Visx Star/S4 using the Baitch Visx working-distance extender. Marshall Cyrlin, MD, surgeon.
The latest technology for custom LASIK
On Thursday, Dec 10, I put my sight on the line and underwent LASIK eye surgery at Will Vision and Laser Centers in Vancouver, Washington. Dr. Brian R. Will has extensive experience in the field, and felt confident we could achieve success despite the fact that I am a nystagmus patient (my eyes shake back and forth rapidly, and uncontrollably). The latest Visx Star S4 IR with CustomVue and Active Eye Tracking has some amazing capabilities. It is now possible to treat Nystagmus patients. I searched far and wide before I found a Doctor I felt comfortable with. 
Short video on why a patient has LASIK Eye Surgey at the May Eye Care Center in Pennsylvania.