@ Sethu, the glass is from Fastrack. Mine one looks like a normal Aviator Sunglass, but the "magic can be seen by the eyes of the beholder"
. Cost Rs.1995.
Please don't buy it online. Go to a Fastrack shop and ask for polarized glasses. you may opt for other brands too. there are polarization testers available with them, where you'll be able to check whether the glasses are polarized or not. this test is a must for confirmation.
I am telling you, you'll love it.