Device for measuring and correcting aberration of an eye

A device for measuring and correcting aberrations of an eye and for use with an ophthalmic apparatus for measuring and correcting optometric parameters, the device comprising:

• a laser unit for providing parallel light for a retina of the eye;
• a wavefront sensing unit for receiving and processing the light reflected by the retina so as to generate wavefront data of wavefront aberrations based on a shift of the light;
• an aberration correcting unit for correcting a difference between the wavefront data based on the wavefront data;
• an optometric testing unit for testing and verifying the wavefront aberration-corrected optometric parameters of the eye;
• and
• a beam-splitting unit disposed between the laser unit, the wavefront sensing unit, the aberration correcting unit, the optometric testing unit for providing optical path structures configured in such a way that the wavefront sensing unit and the optometric testing unit form aplanatic structures.