I have been waiting for this procedure for years. The results are unbelievable, and Dr. Lusby and staff were so personable and professional. I recommend this experience to everyone I know."

- Lisa P.


Custom LASIK

To understand Custom LASIK, one first needs to understand conventional LASIK. In conventional LASIK, we measure your prescription as if we are going to make your best-ever pair of glasses. That prescription is entered into the excimer laser, and it then reshapes your cornea so that you will see as if you are wearing those best-ever glasses. This technique has worked very well for hundreds of thousands of people since the dawn of LASIK back in the 1990’s.

In Custom LASIK, we take all of the same measurements as we do in conventional LASIK, however, we also measure your eyes with a device called an aberrometer. This device was originally developed to analyze the optical quality of high-powered telescopes but it has been adapted to do the same kind of analysis on the complete optical pathway of the human eye. What the aberrometer actually detects is an optical wavefront (custom treatments are sometimes called “wavefront driven”). This is accomplished by shining a low energy laser into the eye, which is then reflected back out of the eye. The exiting rays (which form a wavefront) are then collected and their direction in space determined. With this information the aberrometer then calculates what are called higher order aberrations or HOA’s. You can think of HOA’s as subtle abnormalities in the eye’s optical pathway that are not detectable in a regular exam for glasses. (Nearsightedness and astigmatism are lower order aberrations and they are detectable in a regular exam for glasses and are, as you recall from above, the basis for the treatment in conventional LASIK). HOA’s are responsible for things like glare, halo, ghosting, and, if significant, may prevent an eye from being able to see 20/20 even with best-ever glasses in place or after conventional LASIK. Once the aberrometer has measured the HOA’s, it then calculates a refinement to the laser treatment to correct them. ...continue

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