Self-correction area array source visual field measuring instrument

Abstract

The invention discloses a self-correction area array source visual field measuring instrument, and belongs to an instrument for diagnosing diseases which is generally used in ophthalmology. In the area array source display equipment provided by the invention, a flat panel electronic display screen is adopted; for the selected flat panel electronic display screen of a different aspect ratio, the length of a variable-length connecting rod can be elongated or shortened by adjusting a positioning bolt on the variable-length connecting rod; the variable-length connecting rod is connected with a variable-length straight rod; the variable-length straight rod is connected with the variable-length connecting rod; the tail end of the variable-length connecting rod is connected with image acquisition equipment; and a pedestal is connected with a lifting electric table through a slide rail and is used for placing the flat panel electronic display screen. The upper surface of the lifting electric table is provided with a horizontal guide rail which is parallel to the flat panel display screen; a sliding plate which can slide along the horizontal guide rail is arranged on the horizontal guide rail; and a vertical guide rail along which the sliding plate can vertically slide is arranged perpendicular to the horizontal guide rail. The sliding plate is connected with a lower holder through theconnecting rod and a threaded sleeve. The visual field measuring instrument is suitable to be used by different levels of hospitals, is low in cost, and flexible and convenient in operation, and has a self-maintenance function.

Description

technical field [0001] The invention relates to a perimetry instrument for measuring the visual field of a subject, which belongs to an instrument commonly used in ophthalmology for diagnosing diseases. Background technique [0002] The visual mark of the traditional hemispherical perimetry is displayed by means of light-emitting diodes or optical fibers embedded in the hemispherical screen, or light point projection. This display method has great limitations, because not only the size of the visual mark, but also the The position, color and shape are relatively fixed, which limits the implementation of many applications, and the optical system for displaying the visual target is more complicated and difficult to maintain. For example, the position and size of the visual target of the fiber-optic automatic vision instrument are fixed by the position and size of the optical fiber hole ; Light-emitting diodes as a display visual standard not only cannot be flexibly converted i...

AI Technical Summary

Problems solved by technology

[0002] The visual mark of the traditional hemispherical perimetry is displayed by means of light-emitting diodes or optical fibers embedded in the hemispherical screen, or light point projection. This display method has great limitations, because not only the size of the visual mark, but also the The position, color and shape are relatively fixed, which limits the implementation of many applications, and the optical system for displaying the visual target is more complicated and difficult to maintain. For example, the position and size of the visual target of the fiber-optic automatic vision instrument are fixed by the position and size of the optical fiber hole ; Light-emitting diode as a display visual mark not only cannot be flexibly converted in color, but also the brightness level is not easy to subdivide, which affects the visual field detection effect

Because the traditional hemispherical perimetry is inconvenient to adjust the central fixation point or detect the position, display range, size or color of the target, it is not easy to develop more inspection methods, which reduces the flexibility and efficiency of visual field detection, and also reduces the number of affected areas. The scope of application of the inspection object

In addition, if the vision meter is used for a long time, the light source of the visual target is easy to age. If there is no light intensity detection and correction measures, the detection accuracy will be reduced, and even misjudgment will be caused.

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