Four-point vision range detecting device

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.