Eye detection in digital images: challenges and solutions

eye detection has an important role in the field of biometric identification and recognition of one of the known person. In recent years, great efforts have been made to detect eye can detect this automatically on the image with different conditions. But, each method has its own problems and challenges and can control some of these conditions. In this paper, a variety of different methods to detect eye and explain the comprehensive category. In each category the advantages and disadvantages of each method will be explained