MBP display, keyboard backlight and camera issue
You most likely caused damage to your MacBook Pro's screen, video cable, and or keyboard cable.

I did a bit of research and found a very similar condition to the picture you provided (see below) it’s called “stage lighting effect”.  This was posted on the iFixit forum.  The resolution to this problem was a warranty replacement.   Being that your MacBook Pro is 6 to 7 years old, this will be an out-of-pocket repair. 



You may be able to repair it by replacing the backlight led, but at this point, it's purely speculative.  My suggestion is to replace the screen rather than risk further damage by attempting to replace the backlight.