Wearable intraocular pressure detection device and detection method based on corneal contact lens grating

Abstract

The invention discloses a wearable intraocular pressure detection device and detection method based on a corneal contact lens grating. The wearable intraocular pressure detection device comprises a wearable bracket and a corneal contact lens, wherein the wearable bracket is used for arranging a light source, a photoelectric detector and a processing circuit, and the light source is used for emitting a light beam; the corneal contact lens is used for reflecting the light beam emitted by the light source, and comprises a transparent grating-free area located in a central area and a grating arealocated in a fringe area of the ; the photoelectric detector is used for receiving a diffraction light beam reflected by the corneal contact lens and converts an acquired light signal into an electricsignal and transmitting the electric signal to the processing circuit; and the processing circuit is used for processing and calibrating data transmitted by the photoelectric detector. The wearable intraocular pressure detection device is based on an optical principle and has the characteristics of small size, simple process, high comfort, internal device passiveness and the like, and can be wornfor a long term to realize continuous measurement.

Description

technical field [0001] The invention relates to the technical field of ray optics, in particular to a wearable intraocular pressure detection device and detection method based on a corneal contact lens grating. Background technique [0002] Glaucoma is an irreversible ophthalmic disease. Increased intraocular pressure is the main clinical manifestation of glaucoma. Long-term high intraocular pressure will lead to gradual loss of vision. Therefore, it is necessary to continuously monitor the intraocular pressure of glaucoma patients for a long time for timely prevention and treatment. The traditional intraocular pressure testing instrument is a desktop device with a large volume and complicated operating procedures. It needs to be checked by a doctor or professional nurse after the patient registers in the hospital. This makes it difficult to have a continuous understanding of the real-time fluctuations in IOP. It is not very convenient to control the patient's condition an...

AI Technical Summary

Problems solved by technology

[0005] Chinese patent application CN107908015A discloses a soft contact lens based on optical grating and its intraocular pressure measurement method, which measures the diffraction spectrum of the grating, and obtains the parameters of the optical grating changing with time, including period j, top line width , the line width at the bottom of the line and the depth of the groove; and then recursively calculate the intraocular pressure at each moment and the change value of the intraocular pressure at each time period. The required test system is huge and the calculation is complicated, and it is impossible to achieve portable and continuous detection.

Moreover, the grating is an ordinary strip grating, which has a strong directional effect. In practice, it is almost impossible to operate on the contact lens when measuring the diffraction spectrum: it is difficult for the user to control the orientation of the grating on the contact lens when wearing it, which makes It is difficult to determine the light direction during measurement, making this method difficult to use

[0006] Although the existing flattening and flattening detection methods can achieve high detection accuracy, due to the large volume, special personnel are required to operate. In view of the problems of low comfort, long experiment preparation time, and inability to continuously monitor for a long time, it must be to the hospital for testing

Although the electrical detection method based on contact lenses solves the problems of continuous measurement and comfort, there are still problems such as high power consumption, complex process and long-term use of devices are prone to failure.

Images