Comparing corneal biomechanical parameters between primary open-angle glaucoma and pseudoexfoliation glaucoma using...

Area of Science:

• Ophthalmology
• Biomechanical Engineering
• Glaucoma Research

Background:

• Primary open-angle glaucoma (POAG) and pseudoexfoliation glaucoma (PXG) are common forms of glaucoma.
• Corneal biomechanical properties play a role in glaucoma pathogenesis and progression.
• Understanding differences in corneal biomechanics between POAG and PXG is crucial for accurate diagnosis and treatment.

Purpose of the Study:

• To compare the corneal biomechanical properties of patients with POAG and PXG.
• To investigate potential differences in corneal stiffness and deformation using advanced imaging technology.

Main Methods:

• A cross-sectional study involving 33 eyes with PXG and 29 eyes with POAG.
• Corneal biomechanical parameters were assessed using the CorVis ST (Oculus Optikgeräte GmbH, Wetzlar, Germany).
• Statistical analysis included Man-Whitney U test and stepwise linear regression.

Main Results:

• The PXG group exhibited lower central corneal thickness and A2 velocity compared to the POAG group.
• Higher biomechanically corrected intraocular pressure (bIOP) and stress-strain index were observed in the PXG group.
• Lower highest concavity (HC) deformation amplitude, deflection length, and peak distance were found in the PXG group, indicating reduced corneal deformation.

Conclusions:

• Corneal tissue in the PXG group demonstrates increased stiffness compared to the POAG group.
• These findings suggest distinct biomechanical characteristics of the cornea in PXG, potentially impacting intraocular pressure measurements and glaucoma management.