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M.E. Pons, R.B. Rosen, A. Bertolucci; The Outer Retinal Border in Optical Coherent Tomography Ophthalmoscope Scans . Invest. Ophthalmol. Vis. Sci. 2003;44(13):4918.
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Purpose: To investigate the appearance of the outer retinal border in normal and pathologic eyes using the Optical Coherence Tomography Ophthalmoscope (OCT Ophthalmoscope ,University of Kent, Canterbury; UK for OTI, Toronto, Canada). Methods: The OCT Ophthalmoscope is a scanning laser ophthalmoscope which is capable of acquiring high-resolution OCT slices along with confocal fundus images. Normal subjects, patients with full thickness macular hole (MH), patients with retinal pigment epithelium detachment (RPED), and patients with neurosensory detachment (NSD) of different etiologies who were examined with OCT Ophthalmoscope were evaluated. Images were analyzed by comparing them to fundus photographs and fluorescein angiograms. Results: All 20 normal subjects were observed to have a double line at the level of the outer retina. This double line consisted of a thin inner line and a thicker outer line. Five eyes of 5 MH patients had a double line at the borders of the MH and only the outer line was present at the level of the hole. Eleven eyes of 11 patients with central serous retinopathy (CSR) and 5 eyes of 5 patients with NSD from different etiologies had a double line at the border of the NSD. In 9 of these patients the inner line appears to detach from the outer line together with the rest of the retina. In two eyes of patients with CSR, the inner line could not be seen at the level of the serous detachment. In two patients with NSD only a single line was observed throughout the scan. In eight patients with RPED, both lines separate from outer structures. The location of the RPED was confirmed with fluorescein angiography. Conclusions: OCT Ophthalmoscope images clearly differentiates two lines at the outer border of the retina. From the changes which are observed in the various pathologies it is suggested that the internal line appears to belong to the neurosensory retina, and should be included in retinal thickness measurements. The hypothesis that this line represents the interphotoreceptor matrix and its absence may indicate photoreceptor damage, remains to be confirmed with clinical pathological correlation. View OriginalDownload SlideView OriginalDownload Slide
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