Shack-Hartmann sensor. Shack-Hartmann sensors are widely manufactured and sold by more than 10 companies worldwide. These wavefront sensors measure the gradient (first derivate) of the wavefront at a ...

SAN DIEGO — Wavefront technology using a Hartmann-Shack system can be validated by conventional clinical measures, at least for lower order aberrations, according to Steven C. Schallhorn, MD.

In a study conducted at the University of Rochester by Dr. MacRae and associates (presented at Association for Research in Vision and Ophthalmology in May 2001), a Shack-Hartmann wavefront sensor ...