Fast and robust estimation of ophthalmic wavefront aberrations

Abstract

Rapidly rising levels of myopia, particularly in the developing world, have led to an increased need for inexpensive and automated approaches to optometry. A simple and robust technique is provided for estimating major ophthalmic aberrations using a gradient-based wavefront sensor. The approach is based on the use of numerical calculations to produce diverse combinations of phase components, followed by Fourier transforms to calculate the coefficients. The approach does not utilize phase unwrapping nor iterative solution of inverse problems. This makes the method very fast and tolerant to image artifacts, which do not need to be detected and masked or interpolated as is needed in other techniques. These features make it a promising algorithm on which to base low-cost devices for applications that may have limited access to expert maintenance and operation.

Application and Development of Wavefront Sensor Technology

“…To calculate the amount of corneal incision required by visual correction by wavefront aberration, doctor can guide the excimer laser to correct the cornea which can make patients get better visual acuity, and improve the visual quality of eyes. Therefore, the accurate wavefront measurement of the objective aberrations of the human eye has important clinical and experimental value in improving the visual quality of the human eye and the human eye refractive surgery [14].…”