A cataract is a disease as old as man. Always - yesterday and today - is the leading cause of blindness.

And the blindness is one of the worst tragedies that can happen to man, second only to death. By someone even more feared than death itself.

But today the dream of millions of people of all ages, of all places, of all ages, sexes and conditions is true: the cataract is eradicated. The challenge is won! It took centuries. Follow the steps of this success is like walking human history. In miniature. They are found all his sufferings, his dreams, his hopes, his irrationality and rationality, his indomitable strength and ability to react and adapt, his attempts, his disappointments, his successes.

The author traces these moments through stories that reconstruct reality, past, present and future of man's fight against blindness, because "seeing is paradise of the soul, coming out of my eyes" (Piero Hispanic - Pope and ophthalmologist).