Qualifying Quiz

Who can and who can't have the LASIK procedure?

LASIK is not for everyone. There are a few medical conditions that some people have that make them poor candidates for this procedure. These conditions are rare and can be detected during your pre-procedure examination with what is called a Corneal Topographical Map. If a condition exists, it is not wise to proceed and you will be told. Your refractive power, pupil size and pachymetry (thickness of cornea) also need to be evaluated.

LADARVision Custom CorneaA condition brought on by the aging process called presbyopia, cannot be treated. Presbyopia, simply defined, is the loss of flexibility of your eye lens, causing many people to need reading glasses as they get older.

A good number of people can have LASIK. After any adverse conditions have been ruled out, and it is determined that you are a good candidate for LASIK, there are few impediments to a successful procedure.

Following is a short quiz that will give you an idea if you are a possible candidate for LASIK. From here, professional advice from a qualified eye surgeon is required.

  1. If I am myopic (nearsighted) and my correction is:
          a)  less than -6.00 diopters

          b)  greater than -6.00 diopters
    If I am hyperopic (farsighted) and my correction is:
          a)  +3.00 diopters or less

          b)  greater than +3.00 diopters

  2. I have
           a)  Slight astigmatism
          b)  Heavy astigmatism
  3. Typically, my body heals
          a)  Quickly

          b)  Slowly

Look at your answers. If you answered mostly a's you are probably a very good candidate. If you answered mostly b's then you may not be, but don't discount it until you have checked it out thoroughly. It may be that you can have LASIK, but with lower expectations as to the possibility of being able to see 20/20 after the procedure. It may be that a realistic visual expectation for you is 20/40. This may be completely acceptable to you and your lifestyle.

If any of the following conditions apply to you, you are NOT a good candidate to have LASIK:

  • Pregnancy.
  • Unstable refractive error (your vision correction has been changing over the past 12 months).
  • Collagen/Vascular disease.
  • Active ocular disease.
  • Under 20 years of age.
  • Pacemaker users.

I would like to have the LASIK procedure done. Can I walk in to a clinic and have it done today?

No. There are some pre-operative procedures that must be completed beforehand. If you are over 40 it is important that you understand that to date LASIK cannot correct the need to wear glasses for reading (presbyopia). The tests that must be completed before your LASIK procedure are:

  • Eye History & Examination to determine refractive error, absence of eye disease and your expectations of the procedure.
  • Corneal Topography (a topographical map of your eyeball)
  • Pachymetry

It is essential that contact lenses are removed for the appropriate time before testing.

What is the best method for correcting vision errors?

There is no "best" method for correcting vision errors. The most appropriate correction for you depends on your eyes and your lifestyle. You should discuss you situation with your ophthalmologist or eye doctor to decide which correction will be most effective for you.

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For more information contact:
Dr. Murray McFadden
(BSc, MD, FRCS(C), Diplomate of the
American Board of Ophthalmology)
© Copyright 1996-2005 Murray McFadden MD, Inc.

Telephone: (604) 530-3332
Fax: (604) 535-6258
SnailMail: 20434 64th Avenue, Unit #201,
Langley, BC Canada V2Y 1N4

This page last updated on September 30, 2004.
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Murray McFadden MD., Inc. provides Online information by way of Internet for communication and review purposes only. Murray McFadden MD., Inc. does not have editorial control over and has not participated in the development of the materials provided here, other than those materials copyrighted in favour of Murray McFadden MD., Inc. himself, nor has Murray McFadden MD., Inc. exerted any control or participated in the development of other Internet sites which may contain informational materials of a similar nature to those found here. Murray McFadden MD., Inc. disclaims any and all liability for any injury or other damages which may result from the communication or review of information contained here.

Materials produced here are not intended to provide medical information. Rather, the materials are presented for informational purposes only. None of the materials presented may be relied upon by any person for any medical, diagnostic or treatment reasons whatsoever. None of the materials presented here may be relied upon by any person for purpose other than informational purposes without the express written consent of Dr. Murray McFadden or the person indicated as the owner of the relevant materials. Dr. Murray McFadden disclaims any liability for any injury or other damages resulting from the review or use of the information obtained here. Dr. Murray McFadden asks that any person reviewing the materials presented here obtain specific medical advice and answers to specific medical questions, by a qualified eye doctor.