Ensuring high high-precision testing of implants in the regulation of intra intra-eye pressure

Abstract

Among the diseases that lead to partial or complete loss of visual function is glaucoma, which is characterized by increased intraocular pressure (IOP) due to changes in the structures of the eye and the human body, which inevitably leads to blindness. According to the WHO in 2020. more than 5 million people suffer from vision loss in glaucoma, which accounts for 13.5% of all cases of blindness in the world. Today this figure in Ukraine reaches more than 200 thousand patients. Visual problems significantly reduce the level of information perception and cause a pathological condition with progressive death of ganglion cell axons, which causes a decrease and complete loss of the visual field. Known methods of glaucoma treatment use drug therapy, laser therapy and surgical implantation of drainage devices. It was found that the main cause of the disease is a decrease in the speed of movement and outflow of intraocular fluid through the trabecular system of the eye, due to a significant increase in pressure. The optimal rate of fluid formation is normally 2-2.5 μl / min., Ie during the day through this natural system of the patient should be released in a controlled manner and about 3 ml. It is obvious that the implantation of drainage devices in glaucoma is performed after previous unsuccessful treatment procedures and is the last chance to preserve the patientʼs vision, provided that the rate of fluid leakage is successfully regulated. Therefore, there is often a need for preoperative individual selection of implants with the necessary parameters.