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Most frequently found lesions in SD-OCT are hard exudates and hemorrhages followed by cystic spaces.[Table 2] shows qualitative parameters of these lesions in terms of SD-OCT appearance and layers involved.Four morphological patterns of hemorrhages seen on SD-OCT were oval-shaped hyperreflective echos surrounded by hyporeflectivity, medium to high reflective echos causing shadow in the inner retina, high reflective echos at retinal nerve fiber layer and ganglion cell layer causing shadow in case of flame-shaped and organized high reflective membrane at vitreoretinal interface causing shadow in case of subhyaloid hemorrhage.The mean duration of diabetes mellitus from diagnosis was 112.1 76.6 months.[Table 1] shows the quantitative parameters of various lesions in different stages of DR.Keywords: Diabetic retinopathy, spectral domain optical coherence tomography, lesions, posterior vitreous detachment How to cite this URL: Gella L, Raman R, Rani PK, Sharma T.Spectral domain optical coherence tomography characteristics in diabetic retinopathy .The programs used for the present study were Asterisk scan and 3D scan protocols.
Complete PVD was diagnosed when posterior hyaloid is visible in the vitreous cavity without any attachment to the macula on all the scans on SD-OCT.
In subjects with macular edema the prevalence of incomplete PVD was 55.6%.
Conclusion: SD-OCT brings new insights into the morphological changes of the retina in diabetic retinopathy.
In our study we reported appearances of the DR lesions in SD-OCT.
Microaneurysms are saccular outpouchings from the sides of cellular capillaries, both on the arteriolar and the venular side.
Prevalence of incomplete PVD was more in subjects with DR [Figure 1].