Features of the Biomechanical Parameters of the Eye Fibrous Membrane and the Index of the Biomechanical Glaucoma Factor in Various Clinical Situations

Abstract

Objective: to analyze the biomechanical parameters of the eye fibrous membrane and the biomechanical glaucoma factor (screening index for low-pressure glaucoma) studied by the Oculus Corvis ST device in various clinical situations.Patients and Methods: the study included 382 eyes, 181 eyes with glaucoma (47 %), 201 eyes without glaucoma (53 %). Patients were divided into groups: without glaucoma, with glaucoma (POAG, NTG, PEG), with keratotomy, depending on the CCT and axial length. Corneal tomography and biomechanical parameters were measured using Pentacam (Oculus) and Corvus ST, respectively.Results in patients without glaucoma, the stiffness of the eye increases with age (increasing SSI). Even higher SSI in the PEX group. Higher BGF values compared to the control. With PEG, the CCT is thinner, p = 0.005, bIOP is higher than p = 0.038, SSI is higher than p = 0.00 than in the control. With NTG, the CCT is thinner, p = 0.002, bIOP is lower than p = 0.000, DA ratio, R is higher (p = 0.000) than in the control. In all groups, BGF is higher than in the control (POAG p = 0.016, PEG and NTG p = 0.000). With ketatotomy, DA ratio, R and SP-A1 p = 0.000, lower than with myopia, and SST is higher, p = 0.000, BGF is almost twice as high. With a thin cornea, the DA ratio, R, SP-A1 (p = 0.000) and SSI p = 0.044 are lower than in the control, BGF is higher than p = 0.000. With a axial length of more than 24.00 mm below the DA ratio p = 0.034, BGF above p = 0.000.Conclusion: with age, with different CCT, with increasing axial length, with different forms of glaucoma and keratotomy, the indicators of the fibrous membrane of the eye change.

Keywords

• primary open angle glaucoma
• pseudoexfoliative glaucoma
• low-pressure glaucoma