Macular structure-function relationship at various spatial locations in glaucoma

Area of Science:

• Ophthalmology
• Neuroscience
• Medical Imaging

Background:

• Glaucoma is a progressive optic neuropathy characterized by visual field loss.
• Understanding the structure-function (S-F) relationship is crucial for diagnosing and monitoring glaucoma.
• Macular involvement in glaucoma has been increasingly recognized.

Purpose of the Study:

• To investigate if the S-F relationship in glaucoma varies based on macular location.
• To compare the S-F relationship strength across different parafoveal and hemimacular regions.

Main Methods:

• 151 eyes of healthy and glaucomatous subjects were analyzed.
• Macular ganglion cell-inner plexiform layer thickness was measured using spectral-domain optical coherence tomography (SD-OCT).
• Visual field (VF) sensitivity from 10-2 and 24-2 visual field tests was correlated with structural measurements.

Main Results:

• A significantly stronger S-F relationship was observed in the temporal parafoveal sector compared to central or nasal sectors.
• The inferior hemimacula demonstrated a significantly stronger S-F relationship than the superior hemimacula.

Conclusions:

• The temporal parafoveal region exhibits a more robust S-F association in glaucoma than central or nasal parafoveal areas.
• The inferior hemimacula shows a stronger S-F association compared to the superior hemimacula, indicating regional differences in glaucoma's impact.