激光手術,大飽“眼福”
For many of us, walking in the rain can be a pleasant and even soothing experience. For those of us who wear glasses, though, drops of water on the lenses and obscured vision can have us running for cover. Interested in returning to your days before glasses? Good news! Wearing contact lenses is no longer your only option.
Recently, Lasik eye surgery has become the most widely used surgical procedure for vision correction. Myopia, hyperopia, and astigmatism are all caused by an imperfectly shaped eyeball, cornea, or lens. Because of the imperfection, light entering the eye is not clearly focused on the retina.
During the Lasik procedure, a thin piece of the cornea is cut and folded back. Then, a laser is used to reshape the lower layer of corneal tissue. After the corneal flap is lowered back into place, it quickly adheres to the eyeball.
The procedure immediately improves the focus of light on the retina. After only one day of recovery, patients already notice a significant difference, and about 70 percent regain 20/20 vision. However, Laser eye surgery is not without its risks, so Lasik is not for everyone.
If you are considering Lasik surgery, you should first consult an ophthalmologist and a refractive surgeon to see what is best for your particular situation. After all, you have only got two eyes---and they need to last a lifetime.
1. obscured a. 不清楚的
2. cornea n. 眼角膜
3. retina n. 視網膜
4. flap n. 垂下物,蓋
對許多人來說,雨中漫步可能是一種愉快甚至舒服的體驗。但是對我們這些戴眼鏡的人來說,鏡片上的水滴和模糊了的視線,就會讓我們跑去避雨。想回到戴眼鏡之前的日子嗎?好消息!隱形眼鏡不再是你唯一的選擇。
近來,激光眼科手術成了運用最廣泛的矯正視力的外科手術。近視、遠視及散光都是由于眼球、角膜或水晶體變形引起的。由于這種變形,進入眼睛的光線無法清楚地聚焦在視網膜上。
在進行激光眼科手術的過程中,眼角膜的一層薄膜被割開并折疊起來。然后,用激光修整下層角膜組織的形狀。割開的角膜復位以后,就會迅速地附著在眼球上。
這種手術能立即矯正光線在視網膜上的焦點。只需要休養一天,病人就能發現明顯的不同,而且其中百分之七十左右能恢復正常視力。然而,激光眼科手術并不是一點風險都沒有的,因此也并不是每個人都適用。
如果你正在考慮是否要進行激光手術,你應該先請教眼科醫生和視力矯正外科醫生,針對你的個別情況找到最好的治療手段。畢竟,你只有兩只眼睛,而它們是要用一輩子的。