[Dynamic rigidometry]

Area of Science:

• Ophthalmology
• Biomechanical Engineering

Background:

• The corneoscleral membrane's rigidity is crucial for ocular biomechanics.
• Accurate assessment of scleral rigidity is vital for understanding and managing glaucoma.

Purpose of the Study:

• To introduce and validate a novel method, dynamic rigidometry, for assessing scleral rigidity (Eo).
• To compare scleral rigidity in normal subjects and glaucoma patients.
• To investigate the relationship between scleral rigidity, intraocular pressure, and glaucoma stage.

Main Methods:

• Dynamic rigidometry was employed to measure the scleral rigidity coefficient (Eo).
• Studies included 106 healthy individuals and 154 patients diagnosed with glaucoma.
• Data analysis focused on comparing Eo values and correlating them with intraocular pressure and disease severity.

Main Results:

• The average Eo coefficient in normal controls was 0.0044 +/- 0.0008.
• Glaucoma patients exhibited an average Eo coefficient approximately two times higher (0.0109 +/- 0.0018).
• Scleral rigidity (Eo) showed minimal dependence on intraocular pressure levels but demonstrated a clear relationship with glaucoma stage.

Conclusions:

• Dynamic rigidometry provides a reliable method for assessing scleral rigidity.
• Increased scleral rigidity is a characteristic finding in glaucoma patients.
• Scleral rigidity is a potential biomarker for glaucoma progression and staging.