Four-point vision range detecting device and detecting method

Abstract

The invention relates to an instrument for detecting eyes, in particular to a portable type four-point visual field detecting device which can perform rapid glaucoma screening for a crowd, and a detecting method thereof. The instrument solves the problems that the volume of the prior hemispherical perimeter is large, the detecting time is long, and the novel frequency-doubling perimeter is expensive. The instrument adopts the technical proposal which adopts a planar visual field screen, a camera obscura with a visual field screen being sealed at one end and a gazing hole being arranged at the other end, and a lower jaw bracket installed in front of the camera obscura; the distance between the gazing hole and the center of the visual field screen is 330 mm, a central light emitting diode is arranged in the center of the visual field screen, four peripheral light emitting diodes are arranged in the position of the intersection point of the visual angle circular of the gazing hole which is arranged inward for 15 degrees and a plus or minus 35 degrees oblique line in a rectangular coordinate which takes the central light emitting diode as an initial point, a yellow background lamp is respectively arranged in the four corners of the visual field screen, and the detecting control circuit of the yellow background lamp comprises a single-chip microcomputer which is connected with each light emitting diode on the visual field screen by outputting and connected with an answer key by inputting, and a computer which is composed of an input keyboard, a display and a printer, which are connected through a serial communication interface.

Description

technical field [0001] The invention relates to equipment for testing eyes or an instrument for checking eyes, in particular to a four-point visual field detection device and detection method that are compact in structure, easy to carry, fast in detection and complete in function, and can quickly screen people for glaucoma. Background technique [0002] The range of space that can be seen when the fixating eye (monocular or binocular) fixes is called the visual field. Visual field defects are caused by damage to the visual conduction pathway, and damage to different parts of the conduction pathway will cause a corresponding range of visual dysfunction. According to the shape and scope of the visual field defect, it can help to find the type and location of the lesion. In the field of ophthalmic vision, the most researched is glaucoma visual field change. [0003] Glaucoma is a blinding eye disease characterized by optic neuropathy with progressive visual field loss. Accor...

AI Technical Summary

Problems solved by technology

However, the new perimetry is expensive and still has certain limitations, which require continuous improvement

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