Higher Order Aberration


Aberrations are deviations from normal vision, for example, blurring of an image. First order aberrations include myopia, hyperopia, presbyopia and astigmatism. Higher order aberrations are also refractive errors in the eye but only account for about 15% of vision problems. They can be caused by an irregular cornea, irregular eye lens, eye injury, scarring, dry eyes and large pupils. As well as blurred vision, higher order aberrations can also cause; glare, halos, ghosting and starbursts.

Recent developments in technology have enabled higher order aberrations to be detected using wavefront technology. The results from wavefront technology can produce accurate measurements and diagnoses of higher order aberrations. Unlike lower order aberrations, they cannot be measured by the sphere and cylinder. Wavefront information can be incorporated into the prescription for glasses and contact lenses as well as laser eye surgery.


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