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There are a few steps that preoperative patients need to complete before LASIK can be done, such as preliminary preoperative examination and an eye evaluation, which will be performed by our refractive surgery specialists.


  1. A person who desires the freedom from wearing glasses and/or contact lenses and dislikes the inconveniences that occur from ones’ dependence on eyewear.
  2. All individuals considering LASIK surgery must be at least 18 years old. Young eyes are still in their development stages and are constantly changing, so it is advisable to wait until eyes reach their mature, stable phase. This will assure the most positive, permanent result.
  3. An individual free of corneal disease, especially keratoconus or thin cornea, or any disease that will delay the wound healing process.
  4. Pregnant woman are not allowed to receive LASIK treatment due to the instability of the bodies hormones.
  5. People who have a complete understanding of the benefit and side effects of the LASIK surgery, and have realistic expectations of the outcomes.


The preoperative eye examination includes

1. Taking off the contact lens before the preoperative examination for soft contact lenses, the contact lenses need to be taken off 3 days ahead of the day of consultation. For hard contact lenses, the contact lenses need to be taken off 7 days ahead of time.

The reason is that wearing contacts lenses, for a long time, could change the curvature of the cornea, therefore the refraction have changed as well. Not wearing contact lens, for a while, will cause the shape and the curvature of eye to revert back to its natural shape, enabling us to get more precise data of the cornea.

2. It will take 2-3 hours for the LASIK work up and examination for the detail data of

  • the corneal curvature and the corneal thickness by Orbscan and Topography
  • the pupil diameter by infrared Pupillometer
  • the refraction by Auto Refractometer
  • Manifest refraction before pupil dilatation with refractionist.
  • Measure Wavefront by OPDScan
  • dilate the pupil (this will be effecting your vision and light sensitivity)
  • Cycloplegic refraction after the pupil dilatation with refractionist.
  • work up examination and discuss with our refractive surgeon

3. Due to the blurry vision that results after the dilatation of the eyes, it is recommended that the patient be accompanied by a relative or close friend. Dilation because the eyes to become extremely light sensitive and the patient might not be able to drive a vehicle after dilating the pupil.

4. Bring a pair of sun glasses is recommended.