is there any way to reduce sensitivity of the light sensor

Not to sound dumb, but I have been a primarily mac user for a short time, but what is the light sensor? Are you talking about when you have your screen lit up to your preference, and you turn or tilt your head and it fades a little, kind of like what I think windows laptops can have, it's as far as I know, a thin sheet that you put on your screen and it's like a "privacy veil", so if someone was sitting next to you, they turn their head to see what you are doing, they can't see what's on your screen? I don't know who whole idea of the shield is though.

 

I think he's referring to the feature that dims the display depending on how bright your surround is.

As far as I know, no, there is no way to adjust the sensitivity...but I admit I haven't researched the subject at length.

 

All i know is the sensor is in the camera

 

It's actually directly to the left of the isight (try putting your finger over it to dim it).

It used to be either in or above the speaker grills (on older models).