Tumhari Nazar Kyon Khafa Ho Gayi is not a movie but a classic song from the Bollywood movie 'Do Kaliyaan', which released back in 1968. The song is a melodious and harmonious depiction of love and misunderstanding, beautifully delivered through the soulful voices of legendary singers, Mohammed Rafi and Lata Mangeshkar. Our protagonists of the film, and performers for this song, are the talented Mala Sinha and Biswajeet.

Let's dive into the larger context of the film to have a thorough understanding. 'Do Kaliyaan' is a classic Bollywood drama with a blend of romance, emotions, and a bit of lighthearted comedy. Directed by R. Krishnan and S. Panju, the film is a Hindi adaptation of the 1961 American film 'The Parent Trap’.

The main plot revolves around Mala Sinha, portraying a character named Neeta, and Biswajeet, playing Ram. Neeta and Ram are a married couple who find their happy life turned around due to misunderstandings created by a third person. These misunderstandings lead to a lot of conflict in their married life, resulting in them separating from each other. The couple has twin daughters named Ganga and Jamuna who remain oblivious to their parents' conflict until they accidentally meet at a summer camp.

Mala Sinha, through her powerful acting skills, beautifully portrays the depths and complexities of Neeta’s character. Biswajeet also does a commendable job of portraying his multi-faceted character who transitions from being a loving husband, to a man filled with anger and betrayal, and then finally a forgiving person, yearning for his lost love.

Coming back to the song 'Tumhari Nazar Kyon Khafa Ho Gayi’, it is picturized on Mala Sinha and Biswajeet. The song is set in the backdrop of a lovely serene day in a picturesque garden. The duet fills the air with a romantic aura, with Biswajeet's character imploring Mala Sinha's character to discern his true love for her, and stop looking at him with ire. The song is a melodious mixture of longing, love, and the pain of feeling misunderstood. It brings out the turmoil within their hearts, both willing to mend what was broken, yet finding it hard due to the harsh words spoken in the past.

The song encapsulates the essence of the film, the yearning for lost love and the will to mend relationships gone awry. Biswajeet with his soft expressions and composed demeanor convinces us about Ram's love for Neeta, while Mala Sinha, with her innocent but confused expressions, expertly depicts the complex emotions of a woman who is still in love with her husband but feels betrayed at the same time.

Sonically, the song is a melodious blend of traditional Indian classical instruments such as sitar, tabla, and harmonium, perfectly harmonizing with the captivating voices of Mohammed Rafi and Lata Mangeshkar. The soulful lyrics are written by Sahir Ludhianvi, and the music is composed by Ravi.

This song is remembered even today, not just for its music and voices, but also for Mala Sinha and Biswajeet’s magnetic performances. 'Tumhari Nazar Kyon Khafa Ho Gayi' is still hummed by lovers and listeners of classic and soulful Indian Cinema music. This timeless number is a gem in the colossal treasure of Indian cinema music, narrating an expressive tale of love, yearning, and reconciliation, making it an obligatory addition to the music library of classic Bollywood song lovers.