This book provides An Efficient Feature Extraction and Classification based Multi -level Deep Learning Frame work for Diabetic Retinopathy Detection model has better efficiency compared to the state of art of conventional approaches. Diabetic retinopathy is a micro vascular disease that induces a number of changes in the retina. Micro aneurysms, haemorrhage exudates, and the development of new blood vessels all alter the diameter of the blood vessel. Most of the conventional multi-class diabetes retinopathy has different issues such as problem of over-segmentation, classification precision,...