Patent ID: 7213919

Claim:
A method of calibrating an ocular wavefront system for eye wavefront measurements, the wavefront system transmitting a wavefront-generating light, the method comprising: reflecting the wavefront-generating light off a target of a calibration device; directing the reflected light from the target through an aperture assembly of the calibration device and into the wavefront system without transmitting the light through any lens of the calibration device and without transmitting the light through any phaseplate of the calibration device, the directed light comprising known diopter defocus wavefront variations induced by a position of the target, wherein directing the light through the aperture assembly apertures the reflected light; measuring a wavefront of the light directed into the wavefront system, the aperture and target emulating eye structures; and comparing the measured wavefront of the light with the known wavefront variations of the light to determine if the wavefront system is properly calibrated.