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Relative Ellipsoid Zone Reflectivity in Macular Telangiectasia Type 2
Lukas Goerdt1, Leonie Weinhold2, Ben Isselmann1
1Department of Ophthalmology, University of Bonn, Bonn, Germany.
Investigative Ophthalmology & Visual Science
|July 18, 2023
Summary
The relative ellipsoid zone reflectivity (rEZR) is a potential biomarker for photoreceptor integrity in macular telangiectasia type 2 (MacTel). Decreased rEZR values correlate with MacTel severity, particularly in specific retinal subfields.
Area of Science:
- Ophthalmology
- Retinal Imaging
- Biomarker Discovery
Background:
- Macular telangiectasia type 2 (MacTel) affects photoreceptor integrity.
- The relative ellipsoid zone reflectivity (rEZR) is a novel potential biomarker for assessing photoreceptor health.
Purpose of the Study:
- To evaluate the utility of rEZR as a biomarker in MacTel.
- To assess rEZR across different stages of MacTel disease.
Main Methods:
- Analyzed rEZR using spectral domain optical coherence tomography (SD-OCT).
- Compared rEZR globally and topographically across MacTel stages and controls.
- Classified MacTel severity using Gass and Blodi criteria.
Main Results:
- MacTel eyes showed globally lower rEZR values, though not statistically significant.
- Significant rEZR decreases were observed topographically in stages 3 and 4/5, particularly in inner temporal, inferior, nasal, and superior subfields.
- rEZR demonstrated a clear association with MacTel disease severity.
Conclusions:
- rEZR shows promise as a novel biomarker for outer retinal integrity in MacTel.
- Findings support rEZR's association with disease severity and predilection areas.
- Longitudinal studies are needed to confirm rEZR's role in tracking photoreceptor changes and disease progression.
