Higher Order Aberrations

No eye is perfect, which means that all eyes have at least some degree of "aberration". Common imperfections, called "lower order aberrations", include nearsightedness, farsightedness, and astigmatism.

"Higher order aberrations" are other imperfections in your eye's optical system that may affect your vision clarity and how well you see in low light or at night. These aberrations can produce vision errors such as difficulty seeing at night, glare, halos, blurring, starburst patterns, or double vision.

The chart above (courtesy of Alcon Inc.) illustrates common shapes of aberrations created when light passes through eyes using wavefront technology.