CNN	convolutional neural network
CapsNet	Capsule Network
CDR	Cup-to-Disk Ratio
ML	Machine Learning
DL	Deep Learning
DNN	Deep Neural Network
SDAE	Stacked Denoising Autoencoder
MLP	Multilayer Perceptrons
AE	Autoencoder
CAE	Convolutional Autoencoder
MSE	Mean Squared Errors
CDAE	Convolutional Denoising Autoencoder
ReLU	Rectified Linear Unit
ROI	Region of Interest
AWGN	Additive White Gaussian Noise
AUC	Area Under the Curve
ROC	Receiver Operating Characteristic
CV	Cross Validation