The movie is an individual reaction of a blind person, who cannot explain what the Vision and the world of Sound he lives in. Raghavan, the protagonist is a blind, who lives 65 years of his life only through the world of sound. His adopted-son Abdulla compels him for an eye transplantation fearing that he may suffer social isolation due to hearing impediments in old age. Raghavan was too late when he realized after the eye transplant, that eyes are only mere instruments and experiences stored in the mind results in seeing them. He's unable to move forward into the world of vision, because he has no reflections of vision stored in his brain. At his age he doesn't have time to realize whatever that comes before the eyes and stored in the brain.
Eyes are only mere instruments, experiences stored in the mind results in seeing them.