JPH0529684Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a slit lamp equipped with an applanation tonometer capable of measuring intraocular pressure.

[Prior Art] Conventionally, when observing and measuring intraocular pressure using an applanation tonometer with a slit lamp, the eye to be examined is coated with fluorescein, an excitation filter is inserted into the optical path of the observation illumination, and the eye is measured from the side. The cornea is illuminated, and the pressure sensor of the applanation tonometer is brought into contact with the cornea to apply pressure, and measurements are taken by watching the contact circle emit fluorescence.

In this way, in order to measure intraocular pressure by looking at the fluorescent image, it is necessary to install an excitation filter in the optical path of the observation illumination.
As shown in FIGS. 5 and 5, a disc 3 provided in the illumination unit 1 and incorporating an excitation filter 2 is manually rotated so that a desired excitation filter 2 is installed in the optical path.

In this way, in the conventional device, an applanation tonometer is placed at the measurement position to measure intraocular pressure, and a disk 3 incorporating various filters 2 is used to insert the excitation filter 2 into the illumination optical path. It is necessary to rotate the filter 2 and select the desired filter 2 from among them, which is a drawback in that it is troublesome in working efficiently.

[Purpose of the invention] The purpose of the invention is to automatically place an excitation filter in the illumination optical path when the tonometer is placed in the position for measuring intraocular pressure by detecting the position of the applanation tonometer. To provide a slit lamp which is attached to a slit lamp and can automatically move a filter out of an optical path when it is in an unused position, thereby contributing to improving work efficiency.

[Summary of the invention] The gist of the invention to achieve the above objectives is as follows:
In a slit lamp to which an applanation tonometer using an excitation filter is attached, a detection means for detecting the position of the applanation tonometer, and an operation means for moving the excitation filter in and out of the illumination optical path based on the output of the detection means. This is a slit lamp characterized by having.

[Embodiments of the invention] The invention will be described in detail based on illustrated embodiments.

FIG. 1 shows a slit lamp, in which a stage section 11 is placed on a base 10, and an illumination section 13 and an observation microscope section 14 are provided on the stage section 11. Further, an applanation tonometer 16 is attached to the microscope section 14 via a rotating shaft 15, and a detection switch 17 such as a micro switch is provided near the rotating shaft 15 of the microscope section 14. An excitation filter 20 driven by an illumination light source 18 and a solenoid 19 is built into the illumination section 13 . Further, an operation stick 21 is provided on the stage section 11, and a face holder 22 is provided on the base 10.
is fixed.

When measuring intraocular pressure, an applanation tonometer 16 is placed between the eye to be examined and the observation microscope 3, as shown in FIG. In this state, the position of the tonometer 16 is detected by the detection switch 17, and in conjunction with the signal, the excitation filter 20 in the illumination section 13 is installed by driving the solenoid 19. Also, when the tonometer 16 is not used,
As shown in FIG.
It is rotated around the center and placed on the side of the observation microscope section 14 so as not to interfere with observation. In this state, by turning off the detection switch 17, the excitation filter 20 in the optical path is moved out of the optical path by the solenoid 19.

Note that since the tonometer 16 may be attached to and detached from the slit lamp, the detection switch 17 is preferably provided in the observation microscope section 14.

[Effect of the invention] As explained above, the slit lamp according to the invention can automatically put in and take out the excitation filter in the illumination optical path by detecting the position of the applanation tonometer. This has the advantage that switching between intraocular pressure measurement and normal observation can be easily performed, and the examination can be carried out efficiently.

[Brief explanation of the drawing]

The drawings show an embodiment of the slit lamp according to the present invention, and FIG. 1 is a side view of the slit lamp, and FIG. 2 is a plan view when an applanation tonometer is used.
Fig. 3 is a plan view when the tonometer is not used, Fig. 4 is a side view of the main parts of a conventional slit lamp, and Fig. 5 is a plan view when the tonometer is not used.
The figure is a plan view of the filter switching disk. Reference numeral 13 indicates an illumination section, 14 indicates an observation microscope section, and 15
is the rotation axis, 16 is the applanation tonometer,
17 is a detection switch, 19 is a solenoid, and 20 is an excitation filter.

Claims (1)

[Claims for Utility Model Registration] 1. In a slit lamp to which an applanation tonometer using an excitation filter is attached, there is provided a detection means for detecting the position of the applanation tonometer, and an output of the detection means to detect the position of the applanation tonometer in the illumination optical path. A slit lamp characterized by having an operating means for inserting and removing an excitation filter. 2. The slit lamp according to claim 1, wherein the detection means is provided in an observation microscope section.