A device for studying the dynamics of hydration of the eye to assess hydration of the cornea and stability of the tear film

摘要

The invention relates to ophthalmology and is intended to study the dynamics of eye hydration to assess hydration of the cornea and the stability of the tear film. The device contains two near-infrared semiconductor laser sources mounted on an ophthalmic tripod with distributed feedback. The sources are capable of generation at wavelengths in the range from 1530 to 1531 nm with an average power of 22 mW and wavelength tuning by means of built-in intracavity micro-heaters. Microheaters are connected by an optical fiber with a photo-mixer, made on a low-temperature InGaAs substrate with log-periodic configuration contact pads, and with the possibility of generating probe radiation in the range from 0.04 THz to 0.4 THz. In this case, the mixer is mounted on the specified tripod with the possibility of directing radiation through a focusing lens with a focal length of 30 mm to the eye surface at an angle of 15 degrees and is configured to register a THz signal with a built-in detector that reflects and passes through the collimating radiation lens. The device provides an opportunity at a fixed initial frequency radiation to evaluate individually the degree of hydration of the cornea and the stability of the tear film with increasing accuracy of determination, which allows implement an earlier diagnosis of lesions of the cornea in various diseases.