Human body is
considered to be the most complex and advanced machine in the world that has
been made till date or would be ever made. No other invention or scientific
discovery is as smart and complex as the human body is and many of the secrets
about it are still uncovered to the world. Out of the many vital parts of the
body, eyes are one of them with a very critical task i.e. vision. We can see
this beautiful and colorful planet with the help of eyes only and hence the
thought of losing them and being unable to see anything is so scary and
frightening for anyone. There are many reasons due to which people lose their
vision and hence are unable to see anything.