Subjective optometry apparatus

Patent metadata

Field	Value
Publication number	US-10188282-B2
Application number	US-201615347915-A
Country	US
Kind code	B2
Filing date	Nov 10, 2016
Priority date	Nov 13, 2015
Publication date	Jan 29, 2019
Grant date	Jan 29, 2019

Abstract

A subjective optometry apparatus includes: a subjective measurer including a light projecting optical system, a corrective optical system including a right-eye corrective optical system and a left-eye corrective optical system, and an optical member for guiding the target light flux corrected by the corrective optical system to an examinee's eye, the subjective measurer subjectively measuring an optical characteristic of the examinee's eye; and an objective measurer including a measurement optical system for emitting measurement light to a fundus of the examinee's eye and for receiving reflected light from the fundus, the objective measurer objectively measuring the optical characteristic of the examinee's eye via the optical member disposed on an optical path of the measurement optical system.

First claim

What is claimed is:

1. A subjective optometry apparatus comprising:
a subjective measurer including a light projecting optical system for projecting a target light flux toward an examinee's eye, a corrective optical system including a right-left pair of a right-eye corrective optical system and a left-eye corrective optical system and disposed on an optical path of the light projecting optical system to modify an optical characteristic of the target light flux, and an optical member shared by a right-eye optical path including the right-eye corrective optical system and a left-eye optical path including the left-eye corrective optical system, the optical member for guiding the target light flux corrected by the corrective optical system to the examinee's eye, the subjective measurer subjectively measuring an optical characteristic of the examinee's eye; and
an objective measurer including a measurement optical system for emitting measurement light to a fundus of the examinee's eye and for receiving reflected light from the fundus, the objective measurer objectively measuring the optical characteristic of the examinee's eye via the optical member disposed on an optical path of the measurement optical system.

2. The subjective optometry apparatus according to claim 1 , wherein
an optical axis between the optical member and the examinee's eye in the subjective measurer, and an optical axis between the optical member and the examinee's eye in the objective measurer are coaxial.

3. The subjective optometry apparatus according to claim 1 , wherein
the optical member includes a concave mirror, and
the subjective measurer guides the target light flux to the examinee's eye by reflecting, using the concave mirror, the target light flux corrected by the corrective optical system toward the examinee's eye, and guides an image of the target light flux corrected by the corrective optical system to the examinee's eye in such a way that a distance between a formation position of the image and the examinee's eye as sensed by the examinee becomes an optically predetermined examination distance.

4. The subjective optometry apparatus according to claim 1 , further comprising:
a displacement detector for detecting displacement of an image of the corrective optical system with respect to the examinee's eye;
a right-left pair of deflecting members disposed between the corrective optical system and the examinee's eye;
a driver for driving the deflecting members; and
a corrector for optically correcting a formation position of an image of the corrective optical system by deflecting an apparent light flux for guiding the image of the corrective optical system to the examinee's eye, by controlling the driver based on a result of detection by the displacement detector.

5. The subjective optometry apparatus according to claim 1 , further comprising:
a correction setter for setting a correction amount for correcting optical aberration caused in the subjective measurer, based on a corrective power of the corrective optical system; and
an aberration corrector for correcting the optical aberration caused in the subjective measurer based on the correction amount set by the correction setter.

6. The subjective optometry apparatus according to claim 5 , wherein
the aberration corrector corrects the optical aberration using the corrective optical system.

7. The subjective optometry apparatus according to claim 5 , further comprising
an insertion/removal unit for controlling insertion and removal of an auxiliary optical member on an optical path of the subjective measurer.

8. The subjective optometry apparatus according to claim 7 , further comprising
a determiner that determines whether the auxiliary optical member is required or not, based on an eye refractive power acquired by the objective measurer, wherein
the insertion/removal unit controls insertion and removal of the auxiliary optical member on the optical path of the subjective measurer, based on a result of determination by the determiner.

9. The subjective optometry apparatus according to claim 5 , further comprising:
a determiner for determining whether an auxiliary optical member is required or not based on an eye refractive power acquired by the objective measurer; and
a display unit for displaying, on a monitor, notification information based on a result of determination by the determiner.

10. The subjective optometry apparatus according to claim 1 , further comprising:
a controller for modifying a presentation distance of a target by the target light flux by modifying a formation position of an image of the target light flux;
a correction setter for setting a correction amount for correcting optical aberration caused in the subjective measurer, based on the presentation distance; and
an aberration corrector for correcting the optical aberration caused in the subjective measurer based on the correction amount set by the correction setter.

11. The subjective optometry apparatus according to claim 1 , further comprising:
a convergence angle modifier for modifying a convergence angle of the target light flux emitted from the right-eye optical path and the left-eye optical path;
a correction setter for setting a correction amount for correcting optical aberration caused in the subjective measurer, based on the convergence angle; and
an aberration corrector for correcting the optical aberration caused in the subjective measurer based on the correction amount set by the correction setter.

12. The subjective optometry apparatus according to claim 1 , further comprising:
an acquisitor for acquiring an objectively measured eye refractive power of the examinee's eye; and
a setter for setting an alignment allowable range for determining an alignment state between the examinee's eye and the subjective measurer, based on the eye refractive power.

13. The subjective optometry apparatus according to claim 12 , wherein
the setter sets the alignment allowable range to be smaller as a diopter value increases in a plus direction or minus direction from zero diopter with reference to the zero diopter.

14. The subjective optometry apparatus according to claim 12 , wherein
the acquisitor acquires the eye refractive power of examinee's eye based on a result of measurement by the objective measurer.

Assignees

• Nidek Kk

Inventors

• Takii Michihiro
• Hanebuchi Masaaki
• Ochi Hisashi

Classifications

• A61B3/103

  for determining refraction, e.g. refractometers, skiascopes · CPC title

• A61B3/0008

  provided with illuminating means (A61B3/117, A61B3/14 take precedence) · CPC title

• A61B3/02 Primary

  Subjective types, i.e. testing apparatus requiring the active assistance of the patient · CPC title

• G02B27/0068

  having means for controlling the degree of correction, e.g. using phase modulators, movable elements (controlling the phase of light using moving or deformable elements G02B26/06) · CPC title

• A61B3/10

  Objective types, i.e. instruments for examining the eyes independent of the patients' perceptions or reactions · CPC title