When someone needs glasses, it means they have errors in their vision like nearsightedness, farsightedness or astigmatism (see common diagnoses). These errors cause vision to be blurry, and are called “lower order aberrations”. A prescription for glasses or contacts corrects these errors. However, there are also errors that are more complex, called “higher order aberrations”. These errors can cause symptoms like glare, halos, blurring, double vision, or starburst patterns.
Until recently, laser eye surgery was only able to correct the lower order aberrations. Now we can use the Wavefront technology to assess for these higher order aberrations. It works by analyzing how light passes through your eye, creating a map of all the aberrations. This map is then programmed into the laser before we do the surgery.
You will be seated in front of a machine and asked to focus on a light. Nothing touches your eye at any point and you will be asked to refrain from blinking during the scan. The test only lasts a few seconds.