Retinal changes in patients with major depressive disorder - A controlled optical coherence tomography study

Area of Science:

• Neuroscience
• Ophthalmology
• Psychiatry

Background:

• Emerging evidence suggests degenerative and inflammatory processes in major depression (MD) pathophysiology.
• Brain volume reductions in MD patients are observed via MRI.
• Retinal changes are noted in neurodegenerative disorders using optical coherence tomography (OCT).

Purpose of the Study:

• To investigate potential retinal alterations in MD patients.
• To explore correlations between retinal changes, MD severity, and duration.
• To test the inflammatory/degenerative hypothesis of MD using OCT.

Main Methods:

• Recruited MD patients and age/gender-matched healthy controls.
• Measured total retinal volume and thickness using spectral-domain OCT.
• Analyzed thicknesses and volumes of five distinct retinal layers.

Main Results:

• OCT data analyzed from 28 MD patients and 20 healthy controls.
• A small but significant difference in total retinal volume was found between the eyes of MD patients (p=0.03).
• No other significant differences in retinal parameters were observed between MD patients and controls.

Conclusions:

• Retinal total volume may differ between the eyes of individuals with MD.
• No significant differences in retinal parameters were detected when comparing MD patients to healthy controls.
• The study highlights the need for further investigation into retinal biomarkers for MD.