激光视力矫正手术

Laser assisted in-situ keratomileusis (LASIK) 和 光屈光性角膜切除术 are two of the most common laser refractive procedures. 它们是用准分子激光进行的, a computer-controlled laser used by a surgeon to delicately sculpt the cornea for better focusing. The laser produces ultraviolet light that emits high-energy pulses lasting only billionths of a second.

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A number of vision problems can be treated with laser refractive surgery, including:

近视: Also known as myopia, a nearsighted eye is somewhat longer than the normal eye. This causes the light rays to focus at a point in front of the retina, resulting in a blurry view of distant objects. Approximately 70 million people in the United States – one in four – have some degree of myopia.

远视: Also known as hyperopia, a farsighted eye is shorter than normal. Light rays are aimed at a focus point behind the retina causing a blurring of objects viewed up close.

散光: 有散光, 角膜的弧度不均匀, causing a distortion of images 和 objects at all distances to be blurred. This distortion is especially noticeable after dark with bright lights.

准备

It is very important that you have all the available information to help you decide whether refractive laser surgery is right for you. We offer a variety of free educational offerings to help patients learn more about refractive surgery, 包括晚间研讨会, patient education materials 和 personalized consultations. Your decision to have surgery should be made carefully 和 without pressure.

在做激光屈光手术之前, you will have an in-depth consultation 和 thorough evaluation with an eye doctor to determine if you are a c和idate for laser surgery. 一般, we prefer patients to be between 21 和 70 years of age, 没有其他严重的眼部问题. In addition, your prescription should have been stable for at least two years. Other factors considered include the health of your eyes, 视力问题的程度, 你的年龄, 职业和生活方式需求, 目标和期望.

在你初次来访时, your doctor will conduct a thorough eye exam 和 record your full medical history, including information about your present 和 past eye conditions. 初次拜访之前, 如果你戴隐形眼镜, it is important that you stop wearing them 和 switch to wearing your glasses full-time. Contact lenses change the natural shape of your cornea 和 can affect the measurements taken to determine how much corneal tissue must be removed during surgery. We will provide you with information on when to stop wearing your contact lenses before your initial visit.

如果你有资格做激光手术, your doctor will discuss the various procedures available 和 their advantages 和 disadvantages, to determine which option best meets your needs. If you do not qualify for laser surgery, your doctor will discuss other non-surgical options.

过程

Laser refractive surgery is a very short outpatient procedure that generally takes less than 30 minutes.

The first step of LASIK is the creation of a thin, smooth flap consisting of the most superficial layers of the cornea. 一旦打开盖子, laser treatment is applied to the cornea underneath the flap in order to precisely reshape the cornea into the desired contour. Finally, the flap is returned to its original position. It is critical that each step be performed with a high degree of accuracy 和 safety in order to ensure the best possible results after LASIK.

There are presently two methods of incising the cornea to create a LASIK flap: using a microkeratome, which has been the st和ard method of flap creation for a number of years, 和 using a femtosecond laser (IntraLase™), 它使用了更新的技术.

You will have an individual consultation with one of our LASIK surgeons to discuss the various LASIK treatment options 和 determine the best option for you. 咨询期间, you will also learn about how to prepare for your recovery, 以及手术后会发生什么.