The honeycomb pattern of large and small cystoid abnormalities in the segmented en face swept-source optical coherence tomography (SS-OCT) section through the outer plexiform and inner nuclear layers of the retina is depicted in Figure, A. Intraretinal cystoid spaces in the conventional B-scan SS-OCT image are shown in Figure, B. The en face reconstruction demonstrates the exact nature, extent, and anatomical configuration of the pathology. Cystoid macular edema is a common sequela of intraocular inflammation resulting from many causes like intermediate uveitis and cataract surgery. The commercially available SS-OCT imaging technology has an axial resolution as high as 1 µm. Because a very large number of scans (100000 A-scan/s) can be acquired, en face reconstruction is possible with this technology.
Rohan Chawla, Koushik Tripathy. En Face Optical Coherence Tomography of Cystoid Macular Edema. JAMA Ophthalmol. 2016;134(12):e164648. doi:10.1001/jamaophthalmol.2016.4648