Portable pupil diameter measuring instrument capable of expanding eyelid and measuring method thereof

Abstract

The invention discloses a portable pupil diameter measuring instrument which comprises an eyeglass frame and foldable eyeglass brackets arranged on two sides of the eyeglass frame. A base block is arranged in the eyeglass frame, an assistant supporting plate is arranged on the eyeglass frame, and a camera module, a lighting system, a distance sensor and a display screen are arranged on the base block. The portable pupil diameter measuring instrument has the advantages that the instrument is simple in structure, portable, easy to use, objective and accurate in measuring result and similar to eyeglasses in size; when in use, measuring can be started by only wearing the instrument on eyes, turning on a power source and pressing down related buttons; a CCD (charge coupled device) camera is used to replace conventional comparison scales for measuring, infrared illumination is adopted to enhance pupil display, a human eye artificial neural network model is adopted to automatically capture the position of a pupil, and measuring results are more scientific and reliable; an assistant structure of the instrument can expand an eyelid, so that working efficiency of working personnel is improved.

Description

technical field [0001] The invention relates to the technical field of medical pupil measurement, in particular to a portable pupil diameter measuring instrument and a measuring method thereof. Background technique [0002] In medicine, the change of intracranial pressure can be preliminarily judged by measuring the diameter of the pupil, which indirectly reflects the severity and outcome of the patient's nervous system disease. The measurement of pupil diameter plays an important role. [0003] At present, the methods for clinical observation of pupil diameter include ruler or pupil comparison ruler measurement method, picture comparison method, and digital camera test method. The ruler or pupil ratio measurement method and the picture comparison method are simple to operate, but it is easy to cause large errors through manual comparison and visual inspection. The measurement results depend on the proficiency and subjective judgment of medical staff, and the accuracy and co...

AI Technical Summary

Problems solved by technology

This method adopts the method of shooting pupil images for processing. When measuring, the distance from the pupil to the camera cannot be fixed, resulting in errors in the distance when shooting, and the vision system cannot be accurately calibrated. It is difficult to convert the accurate size after the image is taken, resulting in measurement results. Inaccurate

[0006] Patent literature (publication number CN104545787A) discloses a wearable pupil light reflection measurement device, which uses an infrared camera to measure the pupil diameter, but the device cannot calibrate the camera in real time. Not the same, or the size of the patient's head structure is different, resulting in a different distance from the pupil to the camera lens after wearing the device, and the misalignment between the pupil center and the camera lens will be more serious. Therefore, when measuring the pupil, the result will be larger. error

Moreover, the device consists of two parts, an eye mask and a data processing device, which are connected by a data cable, and the structure is complicated and inconvenient to use.

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