Characteristic correlations of the structure-function relationship in different glaucomatous disc types.

Area of Science:

• Ophthalmology
• Glaucoma Research
• Neuroscience

Background:

• Open-angle glaucoma (OAG) is a leading cause of irreversible blindness.
• Understanding the structure-function relationship in OAG is crucial for diagnosis and management.
• Optic disc morphology is a known factor influencing glaucoma progression.

Purpose of the Study:

• To investigate how different optic disc types affect the correlation between structure and function in OAG.
• To determine if optic disc morphology influences the regional relationship between circumpapillary retinal nerve fiber layer thickness (cpRNFLT) and visual field sensitivity (mean deviation, MD).

Main Methods:

• 144 eyes of OAG patients were classified into four optic disc types: focal ischemic (FI), myopic glaucomatous (MY), senile sclerotic (SS), and generalized enlargement (GE).
• cpRNFLT was measured using 3D OCT-2000, and MD was assessed using Humphrey Field Analyzer.
• Spearman rank correlation was used to determine the influence of disc type on the structure-function relationship.

Main Results:

• A significant correlation between cpRNFLT and MD was found in the MY (r=0.61), GE (r=0.62), and SS (r=0.52) groups.
• No significant correlation was observed in the FI group (r=0.25).
• The specific regions of the optic disc showing the strongest correlation between structure and function varied by disc type.

Conclusions:

• The correlation between cpRNFLT and MD in OAG is dependent on optic disc morphology.
• Different optic disc types exhibit distinct regional variations in the structure-function relationship.
• Optic disc type should be a consideration in glaucoma research and clinical evaluations of structure-function correlations.