JP3029844B2 - Ophthalmic equipment - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to an ophthalmologic apparatus which is used, for example, in an ophthalmic clinic and has a function of detecting a used portion of an eyeglass lens.

[Prior Art] If the optical axis of a spectacle lens worn with respect to the line of sight of the eye to be examined is eccentric, it causes eye strain due to the prism action of the spectacle lens. Means for confirming that there is no eccentricity by visual observation in a worn state is employed.

[Problems to be Solved by the Invention] However, conventionally, the presence or absence of eccentricity between the line of sight of the eye to be inspected and the optical axis of the spectacle lens is merely confirmed by visual observation, and it is doubtful whether or not this is the case.

On the other hand, when correcting astigmatism or strabismus of the eye to be examined by a spectacle lens including a corrective refractive power and a corrective prism degree, the corrective power and the prism degree of the spectacle lens differ depending on a part, and therefore, the eye to be inspected may be any one of the spectacle lenses when worn. It is necessary to quantitatively grasp whether the part is used, that is, how much the line of sight of the eye to be examined and the optical axis of the spectacle lens are shifted, but the quantitative detection means has not been considered in the past. ,
Whether the correction power and the prism degree are appropriate for the eye to be examined depends on the subjective judgment of the examinee.

An object of the present invention is to precisely use a spectacle lens at a used site,
An object of the present invention is to provide an ophthalmologic apparatus which can be easily detected.

[Means for Solving the Problems] To achieve the above object, an ophthalmologic apparatus according to the present invention includes a face fixing means for fixing the face of a subject wearing a spectacle lens, and a face fixing means for fixing the subject. Fixation means for causing the eye to look,
Imaging means including an optical system for photographing the anterior eye part including the iris of the subject from the line of sight by an image sensor, positioning means for positioning the anterior eye part and the image sensor, Display means for displaying an anterior segment image by the imaging means, and marking means for executing marking for grasping the center position of the iris in the anterior segment image by the display means on the surface of the spectacle lens It is characterized by.

[Operation] The ophthalmologic apparatus having the above-described configuration allows the eye to be examined to fixate while wearing the spectacle lens, observe the iris from the direction of the line of sight by the display means, and grasp the center position of the iris at this time. Is applied to the surface of the spectacle lens.

[Example] The present invention will be described in detail based on an illustrated example.

FIG. 1 is an external view of an embodiment in which the present invention is applied to an auto-refractometer. Reference numeral 1 denotes a base, and the subject S of the base 1 supports the face of the subject S. A face receiving portion 2 for fixing is attached. A slide table 3 is mounted on the base 1 so as to be slidable in the front-rear and left-right directions with respect to the subject S. Further, on the slide table 3, an objective lens 4a facing the eye E is mounted. The provided measurement optical unit 4 is provided. An operation stick 5 and a knob 6 are attached to the examiner's side of the slide base 3 for sliding operation of the slide base 3 or vertical movement operation of the measurement optical unit 4. In addition, as shown in FIG. 2, in order for the examiner to observe the anterior segment of the subject's eye E, the television monitor 7 for observing the anterior segment of the subject's eye E faces the examiner on the slide 3. The output of an image pickup means in the measuring optical unit 4 (not shown) is connected to the television monitor 7.

3 and 4 show a marking member. A slide lever 8 provided with a knob 8a is attached to a side of the housing of the measuring optical unit 4, and the slide lever 8 is provided with a hole 4b provided in the housing. And its longitudinal direction is parallel to the observation optical axis inside the measurement optical unit 4 and is held so as to be movable in a direction along this observation optical axis. At one end of the slide lever 8 on the subject S side, a rotary shaft 9 having an axis perpendicular to the longitudinal direction of the slide lever 8 and oriented in the horizontal direction is attached. Is rotatably supported, and a marking head 11 for performing point-like marking on the spectacle lens G is attached to the tip of the arm 10. A spring 12 is mounted between the slide lever 8 and the arm 10 via the rotating shaft 9, and the arm 10 is moved to the third position by the urging force of the spring 12.
In this state, when the slide lever 8 is moved in the direction of the eye E, the marking head 11 moves on the observation optical axis in opposition to the eye E. Thus, the structure is such that marking is performed on the surface of the spectacle lens G. When the knob 8a of the slide lever 8 is pulled in the direction of the examiner, the marking head 11 retreats from the subject S and moves in the direction of the examiner. And arm 10
Abuts against a pin 13 provided near the opening of the hole 4b, the arm 10 rotates counterclockwise around the rotating shaft 9 against the urging force of the spring 12 as shown by the solid line in FIG. When rotated about 90 degrees, the tip of the marking head 11 comes into contact with the felt material 14 provided with the marking ink provided on the subject S side of the measuring optical unit 4.

At the time of measurement, the examiner grasps the knob 8a in advance and pulls the slide lever 8 toward the front to move the marking head.
The ink is adhered to the marking head 11 by retracting the 11 from the observation optical axis and making it contact the felt material 14.

In this state, the face of the subject S wearing the spectacle lens G is fixed to the base 1 by the face receiving unit 2, and the subject's eye E
The operator operates the operating rod 5 while projecting and observing the anterior segment of the eye on the television monitor 7 and slides the slide base 3 on the base 1 or operates the knob 6 to move the measurement optical unit 4 up and down. By moving, for example, as shown in FIG. 2, an annular alignment target M electrically generated on the television monitor 7 becomes concentric with the iris I of the eye E, and the observation light of the measurement optical unit 4 The eye E is aligned so that the axis coincides with the line of sight of the eye E. In addition, if a fixation target or the like is provided on the observation optical axis inside the measurement optical unit 4 and the fixation eye E is fixed at the time of alignment, the line of sight of the eye E to be examined becomes stable. The operation becomes easy and can be performed accurately.

After the alignment, the examiner moves the slide lever 8
The grip 8a is grasped, and the slide lever 8 is moved to the subject S side. At a point when the slide lever 8 is slightly moved, the arm 10 is raised by the urging force of the spring 12, and the marking head 11 is moved on the observation optical axis. The marking head 11 moves on the observation optical axis. Then, the slide lever 8 is further moved to the subject S side, and as shown in FIG.
By attaching ink to the surface of the spectacle lens G by 11, marking at the position Io corresponding to the center of the iris I is performed.

The marked position Io is used for prescription of the spectacle lens G. Before this marking, the lens axis is used by the lens meter as shown in FIG.
If the marking is made, it is convenient that the difference between them is clearly grasped, and it is possible to judge whether or not to readjust the spectacle lens G based on the difference. Also,
For example, when correcting myopia and strabismus using the spectacle lens G, by using the refractive power and the prism degree measured at this position Io, the spectacle lens G more suitable for the eye E to be examined can be prescribed when actually worn. It is possible to do.

FIG. 7 shows a marking member according to a second embodiment,
A cylindrical marking head 11 'is mounted on an arm 10' provided with a hole 10a, and even if the marking head 11 'is moved on the observation optical axis, the light beam from the measuring optical unit 4 will be marked by the marking head 11'. Is arranged to reach the eye E on the observation optical axis through the center of the eye. Therefore, for example, even at the time of marking, the subject's eye E can continue to fixate on the above-mentioned fixation target, preventing the subject's line of sight from moving, and forming the annular marking more accurately. It is possible to do.

In the above-described embodiment, the present invention is applied to the auto-refractometer. However, an ophthalmologic apparatus in which a marking mechanism is added to a slit lamp or the like may be configured.

[Effects of the Invention] As described above, the ophthalmologic apparatus according to the present invention allows the subject's eye to fixate while wearing the spectacle lens, observes the iris from the line of sight with the display means, and displays the iris at this time. Since the marking for grasping the center position is provided on the surface of the spectacle lens, it is possible to easily and accurately detect which part of the spectacle lens is used by the subject's eye when wearing it. The correctness of the spectacle lens can be confirmed from the degree of deviation from the optical axis of the lens, and in particular, in the case of a spectacle lens including a corrective refractive power and a corrective prism degree, the refractive power measured at that site By using the degree of prism, it becomes possible to prescribe an appropriate spectacle lens depending on the eye to be examined at the time of actual wearing.

[Brief description of the drawings]

1 shows a side view, FIG. 2 shows a rear view, FIG. 3 shows a perspective view of a marking member, FIG. 4 shows a side view of a marking member, and FIG. Fig. 6
FIG. 7 is an explanatory view of a marking position, and FIG. 7 is a perspective view of a main part of a marking member according to another embodiment. Reference numeral 1 denotes a base, 2 denotes a face receiving unit, 3 denotes a slide table, 4 denotes a measuring optical unit, 7 denotes a television monitor, 8 denotes a slide lever, 9 denotes a rotating shaft, 10, 10 'denotes arms, 11, 11'. Is a marking head, 12 is a spring, 13 is a pin, 14 is a felt material, and G is a spectacle lens.

──────────────────────────────────────────────────続 き Continued on the front page (58) Field surveyed (Int. Cl. ⁷ , DB name) G02C 13/00 A61B 3/00-3/16

Claims (1)

(57) [Claims] 1. A face fixing means for fixing a face of a subject wearing a spectacle lens, a fixation means for fixing the subject, and an anterior eye part including an iris of the subject. Imaging means including an optical system for taking an image with an image sensor from a line-of-sight direction; positioning means for aligning an anterior segment with the image sensor; and display for displaying an anterior eye image by the image sensor An ophthalmologic apparatus, comprising: means for performing marking on the surface of the spectacle lens to determine the center position of the iris in the anterior segment image by the display means.