Retinal Nerve Fiber Layer Measures and Cognitive Function in the EPIC-Norfolk Cohort Study

Area of Science:

• Ophthalmology
• Neuroscience
• Gerontology

Background:

• Cognitive decline is a significant concern in aging populations.
• Retinal nerve fiber layer (RNFL) thickness, measurable via optical coherence tomography, is a potential indicator of neurological health.

Purpose of the Study:

• To investigate the association between RNFL thickness and cognitive function in older British adults.
• To determine if RNFL thickness can serve as a biomarker for cognitive performance.

Main Methods:

• Utilized data from 5563 participants in the European Prospective Investigation of Cancer (EPIC) Norfolk cohort study.
• Assessed RNFL thickness using Heidelberg Retina Tomograph (HRT) and cognitive function with multiple tests including SF-MMSE, HVLT, and NART.
• Employed multivariable linear regression, adjusting for various demographic and clinical factors.

Main Results:

• A thicker RNFL was significantly associated with better scores on the SF-MMSE, HVLT, and NART.
• These associations remained significant even after further adjustments, indicating a robust link.
• Mean participant age was 67 years, with data from a large cohort.

Conclusions:

• A significant association exists between RNFL thickness and cognitive performance across various domains including global function, learning, and memory.
• The observed associations were weak and currently lack predictive value for cognitive decline.
• Further research is needed to elucidate the underlying biological mechanisms and confirm clinical utility.