Corneal Endothelial Cell Density in Normal Tension Glaucoma Compared to Healthy Controls

Area of Science:

• Ophthalmology
• Corneal Science
• Glaucoma Research

Background:

• Normal tension glaucoma (NTG) is a form of glaucoma where intraocular pressure is not elevated.
• Corneal endothelial cells are crucial for maintaining corneal clarity and function.
• Previous research has not extensively explored the corneal endothelium in NTG patients.

Purpose of the Study:

• To investigate differences in corneal endothelial cell density (ECD) and morphology between normal tension glaucoma (NTG) patients and healthy controls.
• To analyze the impact of glaucoma medications on corneal endothelial parameters in NTG patients.

Main Methods:

• A cross-sectional study included 24 NTG eyes and 26 age-matched healthy eyes.
• Corneal endothelial cell density (ECD), mean cell size (MCA), and coefficient of variance (CV) were measured.
• Analyses controlled for age and the number and duration of glaucoma medications.

Main Results:

• NTG subjects exhibited significantly lower ECD and larger MCA compared to healthy controls (p=0.044 and p=0.004, respectively).
• No significant difference in CV was found between NTG and control groups.
• NTG subjects on three or more medications showed significant differences in ECD and MCA compared to those on two medications.

Conclusions:

• Normal tension glaucoma is associated with reduced corneal endothelial cell density and altered cell morphology.
• The number of glaucoma medications may influence corneal endothelial cell parameters in NTG patients.
• Further research is warranted to understand the clinical implications of these findings.