A non-invasive human eye intraocular pressure measurement device and method based on optical grating

Abstract

The invention discloses a soft corneal contact lens on the basis of optical gratings and a method for measuring intraocular pressures by the aid of the soft corneal contact lens, and belongs to devices and methods for measuring intraocular pressures of human eyes in a non-invasive manner. By the aid of the soft corneal contact lens and the method, the shortcomings in the prior art can be overcome,and accordingly clinical requirements can be met. The soft corneal contact lens comprises the optical gratings and soft corneal contact lens bodies. The optical gratings are arranged on the soft corneal contact lens bodies by means of preparation, and the optical gratings and the soft corneal contact lens bodies are integrated with one another. The method for measuring the intraocular pressures includes allowing a patient to wear the soft corneal contact lens and sequentially measuring diffraction spectra on the soft corneal contact lens at various moments to obtain time-varying parameters ofthe optical gratings; carrying out recursive computation to obtain the intraocular pressures at every moment and change values of the intraocular pressures in every period of time and displaying andoutputting the intraocular pressures and the change values of the intraocular pressures. The time-varying parameters of the optical gratings include periods j, top line widths, bottom line widths of lines and groove depths. The soft corneal contact lens and the method have the advantages that intraocular pressure values can be accurately and quickly dynamically extracted in real time, and the softcorneal contact lens and the method are applicable to clinically monitoring the intraocular pressures around the clock.

Description

technical field [0001] The invention belongs to a non-invasive human eye intraocular pressure measurement device and method, and relates to a non-invasive human eye intraocular pressure measurement device and method based on an optical grating, more specifically, to a soft contact lens based on an optical grating and its intraocular pressure measurement method. Background technique [0002] The optic nerve damage caused by elevated intraocular pressure accompanied by intraocular pressure fluctuations is called glaucoma. It is the world's first irreversible blinding eye disease, which is very harmful to human health. It leads to slow and irreversible damage to the optic nerve. Hard to detect. Elevated intraocular pressure is not the only cause of glaucoma damage. Pathological intraocular pressure fluctuations also play an important role in the development of glaucoma, and the performance is more subtle. It is difficult to control the fluctuation of intraocular pressure in a...

AI Technical Summary

Problems solved by technology

[0008] Since the thickness of each area of ​​the cornea of ​​the human eye is different, when the intraocular pressure changes, the pressure and change of each area of ​​the cornea are different, and the intraocular pressure at each moment is unique. The existing technology can only obtain the pressure and Pressure change information, so far, there is no report on analyzing the information of intraocular pressure

Images