Ultra wide-field imaging in patients with diabetic retinopathy and branch retinal vein occlusion: Heidelberg spectralis vs ETDRS-7 fields angiography images; [Diyabetik Retinopati ve Retina Ven Dal Tıkanıklığı Olgularında Ultra Geniş Açılı Görüntüleme: Heidelberg Spectralis’e Karşı ETDRS-7 Alan Anjiografi Görüntüleri]
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Date
2019
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Abstract
Purpose: To compare the Heidelberg Spectralis ultra-wide field fluorescein angiography (FA) and Early Treatment Diabetic Retinopathy Study (ETDRS)-7 field images in patients with diabetic retinopathy (DRP) and branch retinal vein occlusion (BRVO). Materials and Methods: FA images, obtained with Spectralis were retrospectively analysed. The images of the DRP and BRVO cases were enrolled in the study. The images were exported to the Microsoft Paint program and the circles pointing to 7-field images were digitally mounted on the wide-field images. ETDRS-7 field and wide field images were compared for distribution of ischemia and neovascularization (NV). Ischaemic areas were classified as mild, moderate or severe ischemia according to the area of one circle of the 7-field image. Results: A total of 136 images of DRP and seven images of BRVO cases were enrolled. 24 images were proliferative DRP while 112 images were nonproliferative DRP according to Spectralis images. ETDRS-7 field images failed to detect severe ischemia in 32 eyes (23.52%), moderate ischemia in 16 eyes (11,76%) and mild ischemia in 36 eyes (26,47%). Also 7-field images could not detect NV in three eyes (11,76%). Also standard 7-field images could not detect severe ischemia in two eyes with BRVO. Conclusion: Ultra-wide field FA images may provide additional informations compared to the ETDRS 7-field images in evaluating retinal vascular diseases which may cause increasing the grading and severity of the diseases. © 2019 Gazi Eye Foundation. All rights reserved.