Use of the structure-function relationship in detecting glaucoma progression in early glaucoma

Area of Science:

• Ophthalmology
• Medical Imaging
• Glaucoma Research

Background:

• Glaucoma is a progressive optic neuropathy.
• Early detection of glaucoma progression is crucial for timely intervention.
• Optical coherence tomography (OCT) and visual field (VF) testing are key diagnostic tools.

Purpose of the Study:

• To evaluate the utility of OCT RNFL thickness and VF measurements in detecting glaucoma progression.
• To compare the diagnostic power of OCT RNFL and VF individually versus in combination.

Main Methods:

• A 3-year longitudinal study of 60 eyes from 39 glaucoma patients with early-stage disease.
• Serial RNFL thickness measurements using Cirrus OCT.
• Concurrent visual field testing using Humphrey Field Analyzer.
• Progression analysis using Guided Progression Analysis (GPA) software.

Main Results:

• Combined OCT RNFL and VF analysis identified progression in 8 eyes.
• Individual OCT RNFL analysis detected progression in 2 eyes.
• Individual VF GPA detected progression in 1 eye.

Conclusions:

• Combined OCT RNFL thickness and VF measurements are more effective in detecting glaucoma progression than either method alone.
• OCT RNFL measurements are valuable for discerning glaucoma progression in patients with mild VF defects.