Outer retinal tubulation (ORT) is believed to be a rearrangement of photoreceptors secondary to retinal damage. It was first discovered by SD-OCT scans and confirmed on histopathologic sections. The condition has been seen in exudative age-related macular degeneration, nonexuative age-related macular degeneration, and other chorioretinal conditions. ORT can be mistaken as a choroidal neovascular membrane on SD-OCT.
Figure 1: Outer retinal tubulation in a patient with nonexduative age-related macular degeneration.
Suggested readings:
Zweifel SA, Engelbert M, Laud K, et al. Outer retinal tubulation: a novel optical coherence tomography findings. Arch Ophthalmol. 2009 Dec; 127(12):1596-602.
http://www.ncbi.nlm.nih.gov/pubmed/20008714
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