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Pre-operative testing to determine if I’m a candidate

The first step is to make an appointment for a complete examination to evaluate the health of your eyes and determine if you are a candidate for surgery. You will receive a dilated exam and have several tests which allow the doctor to evaluate the overall health of your eyes.

One of the tests you will have is a WaveScan, an ophthalmic diagnostic instrument that measures the refractive error and wavefront aberrations (distortions) of the human eye. This technology was originally developed for use in high powered telescopes to reduce distortions when viewing distant objects in space. The technology has now been applied to laser vision correction, measuring imperfections in the eye never before measured using standard methods for glasses and contact lenses. WaveScan measures imperfections in your eyes 25 times more precisely than standard methods.

How Wavescan provides information to the laser system.

You will have the opportunity during your exam to ask questions about the procedure. After the exam is completed, you will learn if you are a candidate for refractive surgery.

Occasionally, the doctor may discover an eye condition. If this occurs, you can be immediately referred to the appropriate eye specialist to diagnose and treat the problem.

LASIK Contact

For additional information on refractive surgery at the Mason Eye Institute, please call (573) 882-0420, email us at or fill out our online form.


University Eye Institute East


3215 Wingate Court
Columbia, MO 65201