The beam of red light focusing on this patient’s eye is laser light. A laser is an optical instrument that produces such intense light that it can be used for cutting. A type of eye surgery, called Lasik surgery, uses lasers to cut eye tissue.
The Back Story
- Each year, more than 600,000 patients have Lasik eye surgery in the U.S. alone. The surgery is used to correct vision problems. It can correct nearsightedness, farsightedness, and astigmatism.
- Lasik surgery works by cutting, and permanently changing the shape of, the cornea of the eye. It often results in 20-20 vision. Usually, patients who previously needed lenses to correct their vision no longer need them after the surgery.
- To see how Lasik surgery is done and why it works, watch the following brief slide show and very short video:
Show What You Know
Learn more about Lasik surgery at the link below. Then answer the questions that follow.
- What is the cornea? What is its role in vision?
- Outline the steps involved in Lasik surgery.
- How is the cornea reshaped during Lasik surgery? How does this improve vision?
- What are some possible risks of Lasik surgery?