How Ramayan's Manthara lost sight of her one eye? | Story of biggest vamp

Many people say that if there was no Manthara in the Ramayana, Lord Ram would not have gone to exile and he would not have killed Ravana. Manthara has been the biggest vamp in Hindi cinema. She wanted to be a heroine but an accident changed her life. What was the accident? How she changed her name after appearing in films and how she became Manthra? Know Lalita Pawar's interesting story in this video.