how to create the effect when light hits the camera

Support Basics & Interface
1

when light hits the camera there is this effect…like a couple of white circles…it’s hard to explain…but i hope you understand and can help me

2

I think you mean lense flares.

http://www.blender.org/modules/documentation/htmlI/x4510.html

I am sure there are other tutorials as well.

-Laurifer