Erythrocyte deformability measurements in patients with glaucoma

Area of Science:

• Ophthalmology
• Hematology
• Pathophysiology

Background:

• Primary open-angle glaucoma (POAG) is a leading cause of irreversible blindness.
• The pathogenesis of POAG is multifactorial, involving intraocular pressure and potentially vascular factors.
• Alterations in blood rheology have been investigated as a contributing factor in POAG.

Purpose of the Study:

• To investigate erythrocyte deformability and aggregability, fibrinogen levels, and hematocrit in POAG patients.
• To determine if red blood cell rigidity is altered in POAG.
• To explore the potential link between erythrocyte abnormalities and glaucoma pathogenesis.

Main Methods:

• Erythrocyte deformability and aggregability were assessed.
• Fibrinogen plasma levels and hematocrit were measured.
• Red blood cell rigidity was evaluated using the Hanss filtration technique.

Main Results:

• Red blood cell rigidity was significantly elevated in patients with primary open-angle glaucoma compared to controls.
• No significant differences were observed in erythrocyte aggregability, fibrinogen plasma level, or hematocrit between groups.
• Increased red blood cell rigidity was the sole significant rheological abnormality found in POAG patients.

Conclusions:

• Elevated red blood cell rigidity is a significant finding in primary open-angle glaucoma.
• This erythrocyte abnormality may play a role in the pathogenesis of optic nerve damage in POAG.
• The findings support the hypothesis that primary oxidative stress could be involved in glaucoma development.