Patent ID: 9649032
Date: 2017-05-16
CPC Classifications: A61B,G02C,G16H

Claim:
1. A wavefront system for measuring refractive errors of an eye for prescription of eyeglasses, comprising: a light source configured to produce a compact image at a retina of an eye, wherein reflected light from the retina generates an outgoing wavefront in front of a cornea of the eye from a reflection of the retina; an optical relay for reproducing a wavefront emerging from the eye at a measurement plane away from the eye; a wavefront sensor at the measurement plane, wherein the wavefront sensor includes a wavefront sampling device and a digital image module, the digital image module configured to record images of a wavefront that passes through the wavefront sampling device; a digital processor configured to take a sequence of wavefront measurements at one time, including a) storing a plurality of wavefront images of the wavefront sensor into a memory unit, b) providing automatic detections of sampling points of the wavefront sensor, c) calculating wavefront slopes across a pupil of the eye, and d) determining wave aberration of the eye that includes at least a focus error, an astigmatism, and a spherical aberration; a display module for displaying the wavefront images with automatic detections of sampling points of the wavefront sensor; a real-time measurement intervention module configured to i) validate and accept measurements from the sequence of wavefront measurements, wherein the measurement validation comprises displaying analyzed wavefront images on a display and rejecting invalid measurements in the sequence of wavefront measurements; a data consolidation module for calculating a spherical power and an astigmatism based on a statistical analysis from the accepted measurements from the sequence of wavefront measurements, the astigmatism comprising a cylinder power and cylinder angle; and an output module configured to communicate a refractive prescription, wherein the refractive prescription includes at least a focus power, the cylinder power and the cylinder angle.