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The collective term for the techniques and instruments (aberrometers) used to measure the deviation of a light wave from its ideal shape (a perfect sphere or plane) after it has passed through an optical system, such as the human eye or a telescope.
read more about wavefront sensing ...The most common method is the Shack-Hartmann sensor, which uses an array of tiny lenses (lenslets) to analyze the local slope of the wavefront at thousands of points simultaneously.
The sensor generates a wavefront map, a visual representation of the optical imperfections, often decomposed into Zernike polynomials for quantitative analysis.
Fundamental to adaptive optics and customized vision correction, enabling devices to precisely correct errors caused by atmospheric turbulence or ocular aberrations.
It provides a comprehensive, objective measurement of all optical errors, including those that cannot be subjectively measured by a patient (high-order aberrations).
It is used extensively in astronomy to correct the distortions caused by the Earth's atmosphere on telescope images (adaptive optics).
No. Wavefront sensing is an entirely objective, non-invasive measurement.