The relationship between central visual field sensitivity and macular ganglion cell/inner plexiform layer thickness...

Area of Science:

• Ophthalmology
• Neuroscience
• Medical Imaging

Background:

• Glaucoma is a progressive optic neuropathy characterized by visual field loss.
• Assessing the relationship between retinal structure and visual function is crucial for glaucoma management.

Purpose of the Study:

• To investigate the correlation between macular ganglion cell/inner plexiform layer (GC/IPL) thickness and visual field (VF) sensitivity at specific test locations in glaucoma patients.
• To identify localized structure-function relationships in the macula.

Main Methods:

• Spectral domain optical coherence tomography (OCT) and 10-2 visual fields (VFs) were used in 137 eyes from 125 glaucoma patients.
• GC/IPL thickness matrices were correlated with VF total deviation values, and macular sectors were analyzed against VF clusters.
• A multivariate model identified VF test locations predictive of GC/IPL sector thickness.

Main Results:

• Correlations between 10-2 VF test points and GC/IPL thickness exhibited localized arcuate patterns within the central macula (ρ=0.43-0.74).
• Twenty-one 10-2 VF test points best predicted sectoral GC/IPL thickness.
• Sectoral VF-OCT correlations were high (ρ=0.53-0.66) and robust to adjustments for retinal ganglion cell displacement.

Conclusions:

• Macular OCT and VF relationships in glaucoma display localized arcuate characteristics in the central macula.
• The identified structure-function relationships suggest that a reduced number of VF test locations may effectively summarize macular functional damage in glaucoma.