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Author Spotlight: Ex Vivo OCT-Based Multimodal Imaging of Human Donor Eyes for Research into Age-Related Macular Degeneration
Published on: May 26, 2023
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OUTER FOVEAL DEFECTS IN TYPE-2 MACULAR TELANGIECTASIA
Kiran Chandran1,2, Anantharaman Giridhar1,2, M S Gayathri1
1Department of Vitreoretinal Services, Giridhar Eye Institute, Cochin, Kerala, India.
Retina (Philadelphia, Pa.)
|December 21, 2022
Summary
Outer foveal defects (OFDs) in Macular Telangiectasia (MacTel) primarily involve ellipsoid and interdigitation zone loss. These findings on spectral domain optical coherence tomography aid in understanding MacTel progression.
Area of Science:
- Ophthalmology
- Retinal Imaging
- Medical Diagnostics
Background:
- Macular Telangiectasia (MacTel) is a degenerative retinal disease.
- Outer foveal defects (OFDs) are a specific manifestation within MacTel.
- Understanding OFD characteristics is crucial for MacTel staging and management.
Purpose of the Study:
- To characterize outer foveal defects (OFDs) in type-2 Macular Telangiectasia (MacTel).
- To analyze spectral domain optical coherence tomography (SD-OCT) findings associated with OFDs in MacTel patients.
Main Methods:
- Single-center observational study of 745 MacTel patients.
- Characterization of patients with OFDs using multimodal imaging, including SD-OCT.
- Gass and Blodi classification used for staging MacTel eyes.
Main Results:
- OFDs were found in 2% of MacTel patients (21 eyes).
- Common findings included hyper-reflective dots, ellipsoid zone loss (86%), interdigitation zone loss (81%), and outer retinal cavitation (67%).
- Most OFDs showed progression on follow-up imaging.
Conclusions:
- Outer foveal defects in MacTel are characterized by ellipsoid and interdigitation zone loss.
- The external limiting membrane is relatively preserved in these defects.
- SD-OCT is essential for identifying and monitoring OFDs in MacTel.
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