: Our eyes are an important part of our health. Everyone rely on their eyes to see universe and make sense around them. Therefore, over the last decades, the development of navigation devices capable of guiding the blind through indoor and outdoor scenarios that has remained a challenge. Many researchers are working to assist visually impaired people in different ways like camera based assistance , voice based assistance , ultrasonic based assistance and in some advance way like transplantation of real eyes but that’s not possible in every case
