When you see an ophthalmologist for a regular eye exam, your eyes are tested to determine which lower order aberrations (LOAs) you have. There are three main LOAs: myopia (nearsightedness), hyperopia (farsightedness), and astigmatism. Glasses and contact lens prescriptions are designed to correct these lower order aberrations.
However, LOAs are far from the only issues that can affect your vision. Wavefront technology – which is used in LASIK surgery – is capable of detecting higher order aberrations (HOAs) in addition to LOAs, allowing Dr. Khanna to pinpoint every problem that is interfering with your vision.
There are over 60 HOAs. Common examples include:
- Ghosting (faint double vision)
- Halos around light sources
- Starbursts around light sources
Some of these irregularities have names, while others are expressed mathematically. Many HOAs are related to dim, low-level light conditions. By identifying your eyes’ HOAs in addition to LOAs, Wavefront technology provides the LASIK laser with a comprehensive “map” of all of your eye’s irregularities, allowing for more precise vision correction. Wavefront diagnosis can also be used in other refractive surgery procedures, including PRK, LASEK, and Epi-LASIK.
If you have further questions about higher order aberrations, please contact The Khanna Institute today or call (877) 254-2662 to schedule your free LASIK screening with Dr. Khanna. We serve patients in Beverly Hills, Westlake Village, and surrounding areas of Los Angeles, California.