Classification of Outer Retinal Layers Based On KNN-Classifier illustrates our work towards the classification of Retinal layers using KNN classifier. In this, we explain Matlab code to which substantiate our results. Also, describe the basics of image processing and details of EYE structure. Here, a KNN-Classifier technique is used to determine whether the eyes are normal or abnormal after the segmentation process. Overall, this book provides a flexible and accurate solution for determining the visibility and location of outer retinal layers and could be used as an aid for the disease diagnosis and monitoring.