公开(公告)号：DE69902549T2

公开(公告)日：2003-04-17

申请号：DE69902549

申请日：1999-04-20

Applicant: ALCON INC

Inventor： LIANG JUNZHONG ,  BURKHALTER H

IPC: G01B11/16 ,  A61B3/10 ,  A61B3/103 ,  A61B3/15

Abstract: Optical characteristics of optical systems, such as the eye, are measured including vision defects of the eye using a collimated beam from a diode laser focused onto the anterior surface of the cornea of the eye for providing a finite source of secondary radiation on the retina of the eye, the image of which is close to a desired diffraction limited spot. The secondary radiation is reflected back from the retina as a reflected wavefront of radiation that passes through the eye and is directed onto a wavefront analyzer where distortions associated with the reflected wavefront are measured. By focusing on the cornea through a long focal length lens and thus converging the beam through a small angle, as opposed to typically focusing a collimated light onto the retina, the need for lenses or lens combinations, and the time required to adjust such to accommodate the differing vision of each patient is eliminated.

公开(公告)号：ES2184445T3

公开(公告)日：2003-04-01

申请号：ES99918729

申请日：1999-04-20

Applicant: ALCON INC

Inventor： LIANG JUNZHONG ,  BURKHALTER JAMES H

IPC: G01B11/16 ,  A61B3/10 ,  A61B3/103 ,  A61B3/15

Abstract: Optical characteristics of optical systems, such as the eye, are measured including vision defects of the eye using a collimated beam from a diode laser focused onto the anterior surface of the cornea of the eye for providing a finite source of secondary radiation on the retina of the eye, the image of which is close to a desired diffraction limited spot. The secondary radiation is reflected back from the retina as a reflected wavefront of radiation that passes through the eye and is directed onto a wavefront analyzer where distortions associated with the reflected wavefront are measured. By focusing on the cornea through a long focal length lens and thus converging the beam through a small angle, as opposed to typically focusing a collimated light onto the retina, the need for lenses or lens combinations, and the time required to adjust such to accommodate the differing vision of each patient is eliminated.