|
||||||||||||||||||||||||||||||||||||||||||||
Laser Vision Correction - FAQ'sWhat types of vision conditions can be improved? The primary function of your eye is to focus light. You need glasses and contacts when your eye cannot properly direct light rays on the retina. The cornea, at the front of your eye, provides most of the focusing power. The lens, inside your eye, provides the fine tuning and reading ability. Light rays must focus precisely on the retina for you to see clearly. If you wear corrective lenses, you may have one of the following refractive problems:
Am I a good candidate? If you are at least 18 years old, and have good eye health with no diseases such as cataracts or glaucoma, then you are likely to be a good candidate. Laser vision correction can treat a broad range of nearsightedness, astigmatism, and farsightedness. In most cases, even patients with severe degrees of nearsightedness, astigmatism, and farsightedness can be treated. You should visit your eye care doctor to determine if you are a good candidate. What procedure is best for me? Your eye care doctor, together with your laser surgeon, will help determine the most suitable procedure for you. LASIK is the most common and accounts for about 90 percent of laser vision correction procedures.Do these procedures hurt? Discomfort will vary depending on the procedure. You will not have any discomfort or pain during the procedure itself. Less than one patient in ten has pain after the procedure, which is treated with pain medication for 24 to 48 hours. Most patients experience only some irritation, light sensitivity, and watering of their eyes for a few days. There is typically less chance of discomfort with LASIK than PRK.How long does the surgery take? Your surgery preparation process typically includes an eye examination, counseling, and the administration of mild eye drops. The entire surgical procedure usually lasts five to 10 minutes per eye. A typical procedure takes about 30 to 40 seconds of actual laser time per eye. The entire process takes approximately two to four hours.What is the excimer laser? The excimer laser is an ultraviolet laser, which utilizes argon and fluorine gases to create a cool, non-thermal beam of laser light, which can break molecular bonds in a process commonly referred to as "photoablation". The most important aspect of the excimer laser is its remarkable precision. It is able to remove 0.25 microns of tissue in a single pulse; that is, 1/200th of a human hair, 1/40th of a human cell, or 39 millionths of an inch in 12 billionths of a second. A simple way to imagine how the laser works is to think of it as placing the curvature from your glasses or contact lenses onto the front surface of your eye, allowing you to see without corrective eyewear. What are the risks? There are some risks associated with all surgical procedures, including laser vision correction. These may include pain or discomfort, night glare, regression, scarring, under or overcorrecting and infection. Other risks include loss of best-corrected vision, which occurs in about one percent of people.Can I treat one eye or both eyes on the same day? The decision to have both eyes treated the same day depends on various factors, but is relatively common. The final determination will be made after consulting with your eye care doctor and your eye surgeon.How should I prepare for the surgery? Your eye care doctor will give you specific instructions for your individual situation, but in general you may follow these guidelines:
Exams or paperwork. If you haven't already completed all required eye exams, signed necessary paperwork including the informed consent, and paid for your procedure, you can take care of those details when you arrive. Last-minute questions. If you have any other questions or concerns be certain to discuss them with your doctor or laser surgeon. What will I feel during the procedure? Your doctor will place anesthetizing eye drops in your eye before the surgery, so you won't feel a thing. What is the recovery time? Many people return to work within two to four days after surgery. Speed of healing differs and those with higher prescriptions typically recover more slowly. What if I'm not satisfied with my vision correction? You should consult with your doctor to set realistic expectations concerning your surgery. However, most laser centers offer enhancement procedures at no cost to you, if needed. Ask the center about their enhancement policies because they may vary by center. Why can't lasers treat presbyopia (the need for reading glasses after the age of 40)? Presbyopia refers to the lens inside our eye not changing shape anymore to help us see up close. In refractive surgery, the laser treats the outside of the eye, not the inside. Is there an age cap for LASIK? There is no upper age limit for LASIK surgery. What are other sources of information? You may want to visit the following Web sites: American Optometric Association You may also want to research the following books:
|
