Adjusting Circumpapillary Retinal Nerve Fiber Layer Profile Using Retinal Artery Position Improves the...

Area of Science:

• Ophthalmology
• Medical Imaging
• Glaucoma Research

Background:

• Glaucoma is a leading cause of irreversible blindness.
• The structure-function relationship in glaucoma is crucial for diagnosis and monitoring.
• Accurate measurement of the circumpapillary retinal nerve fiber layer (cpRNFL) thickness is vital.

Purpose of the Study:

• To evaluate if correcting the cpRNFL thickness profile using retinal artery position and papillomacular bundle tilt enhances the structure-function relationship in glaucoma.
• To determine the impact of these corrections on the relationship between optic disc structure and visual field sensitivity.

Main Methods:

• 142 eyes of 90 open-angle glaucoma patients were studied.
• Spectral-domain optical coherence tomography (SD-OCT) measured cpRNFL thickness.
• Visual field tests assessed retinal sensitivity; linear mixed models analyzed the structure-function relationship.

Main Results:

• Correcting cpRNFL thickness for retinal artery position strengthened the structure-function relationship across all 12 optic disc sectors.
• An additional correction for papillomacular bundle tilt further improved this relationship in 9 out of 12 sectors.

Conclusions:

• Adjusting the cpRNFL profile for retinal artery position significantly strengthens the structure-function relationship in glaucoma.
• Papillomacular bundle tilt correction further refines cpRNFL thickness measurements, improving the structure-function correlation in most sectors.