Method and apparatus for improving vision and the resolution of retinal images

• US 6,948,818 B2
• Filed: 02/20/2002
• Issued: 09/27/2005
• Est. Priority Date: 12/23/1996
• Status: Expired due to Term

• Current Assignee: University of Rochester
• Original Assignee: University of Rochester
• Inventors: Liang, Junzhong, Williams, David R.
• Primary Examiner(s): Manuel, George
• Application Number:
  US10/078,163
• Publication Number:
  US 20030025874A1
• Time in Patent Office: 1,315 Days
• Field of Search: 351/205, 351/211, 351/212, 351/219, 351/221, 351/246, 351/247, 351/232, 351/49, 351/160.R, 600/108, 606/7, 606/10, 606/11, 606/12, 606/13, 606/17, 606/130, 607/88, 607/89, 128/898, 623/6.11, 623/6.27, 356/515
• US Class Current: 351/211
• CPC Class Codes: A61B 3/103 for determining refraction, e.g. refractometers, skiascopes
• CPC Class Codes: A61B 3/14 Arrangements specially adapted for eye photography apparatus or arrangements for taking photographs per se G03B
• CPC Class Codes: A61B 3/156 for blocking
• CPC Class Codes: G01J 9/00 Measuring optical phase difference devices or arrangements for controlling the phase of light beams G02F1/01; Determining degree of coherence; Measuring optical wavelength spectrometry G01J3/00

Abstract

A method of and apparatus for improving vision and the resolution of retinal images is described in which a point source produced on the retina of a living eye by a laser beam is reflected from the retina and received at a lenslet array of a Hartmann-Shack wavefront sensor such that each of the lenslets in the lenslet array forms an aerial image of the retinal point source on a CCD camera located adjacent to the lenslet array. The output signal from the CCD camera is acquired by a computer which processes the signal and produces a correction signal which may be used to control a compensating optical or wavefront compensation device such as a deformable mirror. It may also be used to fabricate a contact lens or intraocular lens, or to guide a surgical procedure to correct the aberrations of the eye. Any of these methods could correct aberrations beyond defocus and astigmatism, allowing improved vision and improved imaging of the inside of the eye.

Claims

1. A method for fabricating a corrective lens to correct at least the third order wave aberrations of the living eye of a patient, comprising the steps of:

(a) generating a reflected point source image of the retina of said living eye;

(b) receiving said reflected point source image and converting said point source image to corresponding digital signals;

(c) calculating wave aberrations of said eye so as to include at least third order modes, using said digital signals; and

(d) providing the corrective lens to the patient to correct at least one of the calculated wave aberrations beyond defocus and astigmatism.

2. The method of claim 1, wherein the corrective lens is a contact lens.

3. The method of claim 1, wherein the corrective lens is an intraocular lens.

4. The method of claim 1, wherein the corrective lens is a spectacle lens.

5. The method of claim 1, wherein step (c) comprises calculating the wave aberrations to include at least fifth order modes.

6. The method of claim 1, wherein step (c) comprises calculating the wave aberrations to include at least tenth order modes.

7. The method of claim 1, wherein step (a) comprises using a plurality of lenslets which form a lenslet array for receiving said reflected point source image of said retina.

8. The method of claim 7, wherein step (a) further comprises polarizing said reflected point source image to remove stray light reflected from the cornea of said living eye before said plurality of lenslets receive said reflected point source image.