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JP-7854811-B2 - ophthalmology equipment

JP7854811B2JP 7854811 B2JP7854811 B2JP 7854811B2JP-7854811-B2

Inventors

  • 広原 陽子

Assignees

  • 株式会社トプコン

Dates

Publication Date
20260507
Application Date
20220111

Claims (12)

  1. The objective lens, An OCT optical system that splits light from a light source into a measurement light and a reference light, projects the measurement light onto the left eye to be examined, positioned on the first measurement optical axis, or the right eye to be examined, positioned on the second measurement optical axis, via the objective lens, and detects interference light between the return light of the measurement light from the left eye or the right eye to be examined and the reference light that has passed through the reference optical path, An optical axis switching member that switches the optical axis of the OCT optical system to substantially coincide with either the first measurement optical axis or the second measurement optical axis, A control unit that controls the optical axis switching member, An intraocular parameter calculation unit calculates intraocular parameters of the left eye under examination based on the detection results of the interference light obtained when the optical axis of the OCT optical system is switched to substantially coincide with the first measurement optical axis, and calculates intraocular parameters of the right eye under examination based on the detection results of the interference light obtained when the optical axis of the OCT optical system is switched to substantially coincide with the second measurement optical axis. Includes, Before performing an OCT measurement using the measurement light on one of the left eye and the right eye, the control unit controls the OCT optical system to adjust the optical path length of the reference light path based on the axial length and refractive power of the other eye, the left eye and the right eye, in an ophthalmic device.
  2. The optical axis switching member deflects the optical path of the measurement light, A first fixation optical system that projects a first fixation beam onto the left eye under examination, A first optical path coupling member optically couples the optical path of the measurement light deflected by the optical axis switching member to the optical path of the first fixed beam, A second fixation optical system that projects a second fixation beam onto the right eye under examination, A second optical path coupling member optically couples the optical path of the measurement light deflected by the optical axis switching member to the optical path of the second fixed beam, The ophthalmic device according to claim 1, characterized by including the following.
  3. The optical axis switching member deflects the optical path of the measurement light, A fixation optical system that projects a fixation beam onto either the left eye or the right eye, An optical path coupling member that optically couples the optical path of the fixed-view light beam to the optical path of the measurement light and guides the fixed-view light beam to the objective lens, A first reflecting member that deflects the optical path of the measurement light, which has been deflected by the optical axis switching member, toward the left eye to be examined, A second reflecting member that deflects the optical path of the measurement light, which has been deflected by the optical axis switching member, toward the right eye under examination, The ophthalmic device according to claim 1, characterized by including the following.
  4. The optical axis switching member deflects the optical path of the measurement light, A first optical path coupling member deflects the optical path of the measurement light, which has been deflected by the optical axis switching member, toward the left eye under examination, and also transmits the first fixation beam from the transmission direction and guides it toward the left eye under examination, A second optical path coupling member deflects the optical path of the measurement light deflected by the optical axis switching member toward the right eye under examination, and also transmits a second fixation beam from the transmission direction to guide it toward the right eye under examination, The ophthalmic device according to claim 1, characterized by including the following.
  5. The ophthalmic apparatus according to claim 2 or 4, further comprising a first adjustment unit that changes the orientation of the first measuring optical axis and the orientation of the second measuring optical axis by changing the orientation of the optical path coupling surface of the first optical path coupling member and the orientation of the optical path coupling surface of the second optical path coupling member.
  6. The ophthalmic apparatus according to claim 2, 4, or 5, further comprising a second adjustment unit that adjusts the alignment direction of the first measuring optical axis and the second measuring optical axis by changing the deflection direction of the optical axis switching member, the orientation of the optical path coupling surface of the first optical path coupling member , and the orientation of the optical path coupling surface of the second optical path coupling member.
  7. The ophthalmic apparatus according to claim 3, further comprising a first adjustment unit that changes the orientation of the first measuring optical axis and the orientation of the second measuring optical axis by changing the orientation of the reflective surface of the first reflective member and the orientation of the reflective surface of the second reflective member.
  8. The ophthalmic apparatus according to claim 3 or 7, further comprising a second adjustment unit for adjusting the alignment direction of the first measuring optical axis and the second measuring optical axis by changing the deflection direction of the optical axis switching member, the orientation of the reflective surface of the first reflecting member, and the orientation of the reflective surface of the second reflecting member.
  9. The ophthalmic apparatus according to any one of claims 2 to 8, further comprising a third adjustment unit that changes the distance between the first measuring optical axis and the second measuring optical axis by moving the optical axis switching member along the first measuring optical axis or the second measuring optical axis.
  10. Two or more imaging units that photograph the anterior segment of the left eye and the anterior segment of the right eye from different directions, A moving mechanism that moves the OCT optical system in three dimensions, Includes, The control unit changes the relative position of the OCT optical system with respect to the left eye and the right eye based on two or more images obtained by the two or more imaging units, and also changes the orientation of the first measurement optical axis, the orientation of the second measurement optical axis, and the distance between the first and second measurement optical axes so that the first measurement optical axis coincides with the visual axis of the left eye and the second measurement optical axis coincides with the visual axis of the right eye. An ophthalmic device according to any one of claims 1 to 9, characterized by the features described herein .
  11. The two or more imaging units described above are: A first imaging unit for photographing the anterior segment of the left eye under examination, A second imaging unit for photographing the anterior segment of the left eye and the anterior segment of the right eye, A third imaging unit for photographing the anterior segment of the right eye under examination, The ophthalmic device according to claim 10, characterized by including the following.
  12. The objective lens, An OCT optical system that splits light from a light source into a measurement light and a reference light, projects the measurement light onto the left eye to be examined, positioned on the first measurement optical axis, or the right eye to be examined, positioned on the second measurement optical axis, via the objective lens, and detects interference light between the return light of the measurement light from the left eye or the right eye to be examined and the reference light that has passed through the reference optical path, An optical axis switching member that switches the optical axis of the OCT optical system to substantially coincide with either the first measurement optical axis or the second measurement optical axis, A control unit that controls the optical axis switching member, An intraocular parameter calculation unit calculates intraocular parameters of the left eye under examination based on the detection results of the interference light obtained when the optical axis of the OCT optical system is switched to substantially coincide with the first measurement optical axis, and calculates intraocular parameters of the right eye under examination based on the detection results of the interference light obtained when the optical axis of the OCT optical system is switched to substantially coincide with the second measurement optical axis. A refractive power measuring optical system that projects a first measurement pattern beam onto the left eye under examination along the first measurement optical axis via the objective lens, and projects a second measurement pattern beam onto the right eye under examination along the second measurement optical axis, and receives the reflected light of the first measurement pattern beam from the left eye under examination and the reflected light of the second measurement pattern beam from the right eye under examination, An eye refractive power calculation unit calculates the refractive power of the left eye under examination based on the reception result of the reflected light of the first measurement pattern light beam, and calculates the refractive power of the right eye under examination based on the reception result of the reflected light of the second measurement pattern light beam, Includes, The refractive power measuring optical system is an ophthalmic device that projects the first measurement pattern light beam and the second measurement pattern light beam such that the focal position is at a position corresponding to the intermediate power between the refractive power of the left eye under examination and the refractive power of the right eye under examination.

Description

This invention relates to an ophthalmic device. Ophthalmic devices capable of performing multiple tests and measurements on a subject's eye are known. These tests and measurements include subjective and objective measurements. Subjective tests obtain results based on the subject's responses. Objective measurements obtain information about the subject's eye primarily using physical methods, without relying on the subject's responses. For example, Patent Document 1 discloses an ophthalmic device capable of subjective and objective measurements. This ophthalmic device can perform objective measurements such as refractive power measurement, corneal topography measurement, and imaging and measurement using optical coherence tomography. This ophthalmic device has a common optical system for both eyes, and it is possible to perform subjective and objective measurements on one of the eyes using this optical system. Furthermore, for example, Patent Document 2 discloses an ophthalmic device capable of independently presenting fixation targets to each of the left and right eyes while performing refractive power measurement on one of the eyes using a single optical system. In contrast, for example, Patent Document 3 discloses an ophthalmic device equipped with two optical systems independently provided for the left and right eyes, capable of simultaneously performing refractive power measurement and corneal topography measurement for both eyes using these two optical systems. Furthermore, for example, Patent Document 4 discloses an ophthalmic device capable of simultaneously acquiring Hartmann images of both eyes and simultaneously measuring wavefront aberrations in both eyes. Japanese Patent Publication No. 2016-187461Japanese Patent Application Publication No. 06-304139Japanese Patent Publication No. 2019-062939U.S. Patent No. 8506079 This is a schematic diagram showing an example of the configuration of the optical system of an ophthalmic device according to the first embodiment.This is a schematic diagram showing an example of the configuration of the optical system of an ophthalmic device according to the first embodiment.This is a schematic diagram illustrating the optical system of an ophthalmic apparatus according to the first embodiment.This is a schematic diagram illustrating the optical system of an ophthalmic apparatus according to the first embodiment.This is a schematic diagram showing an example of the configuration of the optical system of an ophthalmic device according to the first embodiment.This is a schematic diagram showing an example of the configuration of the optical system of an ophthalmic device according to the first embodiment.This is a schematic diagram illustrating the optical system of an ophthalmic apparatus according to the first embodiment.This is a schematic diagram illustrating the optical system of an ophthalmic apparatus according to the first embodiment.This is a schematic diagram illustrating the optical system of an ophthalmic apparatus according to the first embodiment.This is a schematic diagram illustrating the optical system of an ophthalmic apparatus according to the first embodiment.This is a schematic diagram showing an example of the configuration of the processing system of an ophthalmic device according to the first embodiment.This is a schematic diagram showing an example of the configuration of the processing system of an ophthalmic device according to the first embodiment.This is a schematic diagram showing a flowchart of an example of the operation of an ophthalmic device according to the first embodiment.This is a schematic diagram showing a flowchart of an example of the operation of an ophthalmic device according to the first embodiment.This is a schematic diagram showing an example of the optical system configuration of an ophthalmic device according to the second embodiment.This is a schematic diagram showing an example of the optical system configuration of an ophthalmic device according to the second embodiment.This is a schematic diagram illustrating the optical system of an ophthalmic apparatus according to the second embodiment.This is a schematic diagram illustrating the optical system of an ophthalmic apparatus according to the second embodiment.This is a schematic diagram showing an example of the optical system configuration of an ophthalmic device according to the second embodiment.This is a schematic diagram showing an example of the configuration of the processing system of an ophthalmic device according to the second embodiment.This is a schematic diagram showing an example of the optical system configuration of an ophthalmic device according to the third embodiment.This is a schematic diagram showing an example of the configuration of the processing system of an ophthalmic device according to the third embodiment. Examples of embodiments of the ophthalmic apparatus according to this invention will be described in detail with reference to the draw