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LASIK: Before Your Surgery

Cross section of the eye

What is LASIK surgery?

Laser in-situ keratomileusis (LASIK) is surgery to improve how well you can see. It reshapes the outer part of your eyeball called your cornea. This can fix vision problems in one or both eyes. These problems include nearsightedness, farsightedness, and astigmatism.

To do the surgery, the doctor first cleans your eye and puts drops in it. The drops numb your eye. Then the doctor uses special tools to keep your eye open and to put pressure on your cornea. With a blade or laser, the doctor cuts a flap in your cornea. With another laser, the doctor reshapes the cornea and then puts the flap back. Then the doctor puts more drops in your eye and covers it with a clear shield.

The surgery takes about 10 to 20 minutes. Before surgery, you may get medicine to help you relax. During surgery, you may feel pressure in your eye. After surgery, your eyes may burn or itch. You may feel like there is something in your eye. Your eye may also water more than usual.

You may see better as soon as the surgery is over. Or things may look blurry for a few days. You will probably be able to go back to work or your normal routine in 1 to 3 days.

For some people, it takes 3 to 6 months to see as clearly as possible. But most people no longer need glasses or contact lenses.

How do you prepare for surgery?

Surgery can be stressful. This information will help you understand what you can expect. And it will help you safely prepare for surgery.

Preparing for surgery

  • Be sure you have someone to take you home. Anesthesia and pain medicine will make it unsafe for you to drive or get home on your own.
  • Understand exactly what surgery is planned, along with the risks, benefits, and other options.
  • If you take a medicine that prevents blood clots, your doctor may tell you to stop taking it before your surgery. Or your doctor may tell you to keep taking it. (These medicines include aspirin and other blood thinners.) Make sure that you understand exactly what your doctor wants you to do.
  • Tell your doctor ALL the medicines and natural health products you take. Some may increase the risk of problems during your surgery. Your doctor will tell you if you should stop taking any of them before the surgery and how soon to do it.
  • Make sure your doctor and the hospital have a copy of your advance care plan. If you don't have one, you may want to prepare one. It lets others know your health care wishes. It's a good thing to have before any type of surgery or procedure.

What happens on the day of surgery?

  • Follow the instructions exactly about when to stop eating and drinking. If you don't, your surgery may be cancelled. If your doctor told you to take your medicines on the day of surgery, take them with only a sip of water.
  • Take a bath or shower before you come in for your surgery. Do not apply lotions, perfumes, deodorants, or nail polish.
  • Take off all jewellery and piercings. And take out contact lenses, if you wear them.

At the hospital or surgery centre

  • Bring a picture ID.
  • The surgery will take about 10 to 20 minutes.
  • After the surgery, you will have a clear shield over your eye. You will be able to see with it on. But your doctor may tell you to keep your eye closed as much as possible for up to 24 hours.
  • You will get drops in your eye to help it heal.

When should you call your doctor?

  • You have questions or concerns.
  • You don't understand how to prepare for your surgery.
  • You become ill before the surgery (such as fever, flu, or a cold).
  • You need to reschedule or have changed your mind about having the surgery.

Where can you learn more?

Go to

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Care instructions adapted under license by your healthcare professional. If you have questions about a medical condition or this instruction, always ask your healthcare professional. Healthwise, Incorporated disclaims any warranty or liability for your use of this information.