I saw the movie,it wasn't just prayer it was Rishi Kapoor's powerful singing too.
And maybe Sadhna should hit the goon on the head again,that may wake him up.
since thats how people regain their memories and eyesight in hindi movies.
I don't discount the power of prayer ,positive thought are powerful ...they just don't show instantaneous results and agar kisi ka time aa gaya toh aa gaya.
Otherwise Alekh would have been better loooong ago
Yes, Rishi kapoor's powerful singing...it was a magical song....I had a discussion with someone about this particular scene in the movie that if it made any sense. I was told...they show what the audience wants to see.