Two-eye adaptive optical visual perception training method and apparatus thereof

• US 8,020,991 B2
• Filed: 06/04/2010
• Issued: 09/20/2011
• Est. Priority Date: 12/18/2009
• Status: Expired due to Fees

• Current Assignee: The Institute of Optics And Electronics The chinese Academy of Sciences (Chinese Academy of Sciences), University of Science and Technology of China (Chinese Academy of Sciences)
• Original Assignee: The Institute of Optics And Electronics The chinese Academy of Sciences (Chinese Academy of Sciences), University of Science and Technology of China (Chinese Academy of Sciences)
• Inventors: Rao, Xuejun, Dai, Yun, Zhao, Haoxin, Zhang, Yudong, Zhou, Yifeng
• Primary Examiner(s): Pinkney; Dawayne A
• Application Number:
  US12/794,473
• Publication Number:
  US 20110149237A1
• Time in Patent Office: 473 Days
• Field of Search: 351/200, 351/203, 351/205, 351210-212, 351/221
• US Class Current: 351/203
• CPC Class Codes: A61B 3/14 Arrangements specially adapted for eye photography apparatus or arrangements for taking photographs per se G03B
• CPC Class Codes: A61H 5/00 Exercisers for the eyes

Abstract

The present invention proposes a two-eye adaptive optical visual perception training apparatus, comprising: left and right eye wave aberration measurement sub-systems for measuring eye wave aberrations of the left and right eyes of a person to be tested; left and right eye wave aberration correction sub-systems for driving and controlling the wavefront corrector to correct the wave aberrations of the left and right eyes of the person to be tested based on the measured wave aberrations of the left and right eyes of the tested person; and a two-eye visual perception training sub-system for processing and displaying sighting targets of different spatial frequencies and different contrasts and presenting the sighting targets to the tested person, to conduct a two-eye visual function measurement process and a visual perception training process. By means of the apparatus according to the present invention, finer visual stimulus is obtained by correcting aberrations of two eyes, and then eye acuity limit of the two eyes can be measured, and the visual perception training effect and visual function of the two eyes can be efficiently improved by performing visual perception training on the two eyes with such apparatus.

Claims

1. A two-eye adaptive optical visual perception training method, comprising the steps of:

a two-eye wave aberration measurement step for measuring wave aberrations of the left and right eyes of a person to be tested by using a near infrared reference light source, a wavefront corrector and a wavefront sensor;

a two-eye wave aberration correction step for driving and controlling the wavefront corrector to correct the wave aberrations of the left and right eyes of the person to be tested based on the measured wave aberrations of the left and right eyes of the tested person; and

a two-eye visual perception training step for displaying on a sighting target display sighting targets of different spatial frequencies and different contrasts after they have been subjected to processing in a video processing circuit, and presenting the sighting targets to the tested person via the driven and controlled wavefront corrector, to conduct a two-eye visual function measurement process and a visual perception training process,

wherein the video processing circuit combines the R channel and the B channel from a normal video output and obtains a grayscale of or higher than 14 bits.

2. The two-eye adaptive optical visual perception training method according to claim 1, wherein

the two-eye visual function measurement process consists in a single/two eye contrast threshold measurement, where the difficulty of the stimulus is adjusted in real time in response to the reply from the tested person according to an adjustment method of psychophysics in such a manner that the contrast of the sighting target to be displayed next is decreased if the number of continuous replies from the tested person that are correct reaches a first predetermined value, and the contrast is increased if the number of continuous replies that are wrong reaches a second predetermined value.

3. The two-eye adaptive optical visual perception training method according to claim 2, wherein

the correctness of the tested person during the whole measurement process maintains at a level though the adjustment and then a single/two eye contrast threshold of single/two eye(s) of the tested person is obtained, and thereby a single/two eye contrast sensitivity is obtained by reversing the single/two eye contrast threshold.

4. The two-eye adaptive optical visual perception training method according to claim 3, wherein the two-eye visual perception training process comprises steps of:

measuring a left eye contrast threshold and a right eye contrast threshold of the tested person respectively for gratings of different spatial frequencies;

selecting a spatial frequency corresponding to a predetermined contrast threshold based on the difference of the left eye contrast threshold and the right eye contrast threshold under different spatial frequencies; and

conducting the visual perception training process by using the grating with the selected spatial frequency.

5. The two-eye adaptive optical visual perception training method according to claim 3, wherein the two-eye visual perception training process comprises steps of:

selecting the spatial frequency measured after the preceding visual perception training process; and

conducting the visual perception training process by using the grating with the selected spatial frequency.

6. The two-eye adaptive optical visual perception training method according to claim 1, wherein the two-eye visual function measurement process consists in a two-eye stereoscopic acuity measurement which obtains a psychophysical curve of the tested person by measuring the correctness of the tested person for different aberrations of two eyes using a constant stimulus method of psychophysics.

7. The two-eye adaptive optical visual perception training method according to claim 6, wherein

the two-eye visual perception training process consists in steps of selecting a two-eye aberration according to the measured psychophysical curve;

and

conducting the two-eye visual perception training process for a predetermined period by using the selected two-eye aberration.

8. A two-eye adaptive optical visual perception training apparatus, comprising:

left and right eye wave aberration measurement sub-systems including a near infrared reference light source, a wavefront corrector and a wavefront sensor, for measuring eye wave aberrations of the left and right eyes of a person to be tested;

left and right eye wave aberration correction sub-systems including a control unit and said wavefront corrector, for driving and controlling the wavefront corrector to correct the wave aberrations of the left and right eyes of the person to be tested based on the measured wave aberrations of the left and right eyes of the tested person; and

a two-eye visual perception training sub-system including a video processing circuit, a sighting target display and said wavefront corrector, for displaying on the sighting target display sighting targets of different spatial frequencies and different contrasts after they have been subjected to processing in the video processing circuit, and presenting the sighting targets to the tested person via the driven and controlled wavefront corrector, to conduct a two-eye visual function measurement process and a visual perception training process,

wherein the video processing circuit combines the R channel and the B channel from a normal video output and obtains a grayscale of or higher than 14 bits.

9. The two-eye adaptive optical visual perception training apparatus according to claim 8, wherein the wavefront corrector is selected from a group consisted of a deformable reflective mirror, a liquid crystal wavefront corrector, a Micromachined membrane deformable mirror, a Microelectromechanical deformable mirror, a Bimorph deformable mirror, and a liquid deformable mirror.

10. The two-eye adaptive optical visual perception training apparatus according to claim 8, wherein the wavefront sensor is selected from a group consisted of a microlens-array-based Hartmann wavefront sensor, a microprism-array-based Hartmann wavefront sensor, a Curvature wavefront sensor and a Pyramid wavefront sensor.

11. The two-eye adaptive optical visual perception training apparatus according to claim 8, wherein the sighting target display is selected from a group consisted of a CRT display, a commercial display, a liquid crystal display, a plasma display, an electro-luminescent display, and an organic luminescent display.

12. The two-eye adaptive optical visual perception training apparatus according to claim 8, wherein the left and right eye wave aberration correction sub-systems share one and the same control unit.