Onion ring sign on spectral domain optical coherence tomography in diabetic macular edema: Its evolution and outcomes

CONCLUSION: Horizontal, single or multi-layered HCDs on OCT in DM represent intraretinal or subretinal cholesterol crystal precipitates evolving from the hard exudates identical to the "onion ring sign" seen in neovascular AMD. HCDs or CCs depict deranged lipid metabolism, chronic vascular leakage and can lead to substantial visual impairment if the fovea gets involved.PMID:36703256 | DOI:10.1177/11206721231154187

Source: European Journal of Ophthalmology - January 26, 2023 Category: Opthalmology Authors: Ramesh Venkatesh Rubble Mangla Shama Sharief Sahil Arora Nikitha Gurram Reddy Naresh Kumar Yadav Jay Chhablani Source Type: research