Talk to Eye Specialist on Eyes Grain

This is a picture of my father eyes he underwent eye surgery eight years ago he had black water in her eyes which underwent an operation which failed due to which till today can't sec with both eyes now one of left his eyes looks lens the lens pain them showed to the doctor but he does not operate now in his right eye a white grain is visible from two weeks please if anyone can tell me what is it all white grain? He will have to undergo surgery?