I am generally new to blender and i am attempting to model a persons head. its all going well but when i try to cut around the eye sockets it doesnt leave any sort of line. all it does is create a bunch of random triangles. Am i doing something wrong, if anyone knows please help me out. Thanks!
hello,
welcome aboard!
I beleive you have a wrong understanding of how the Knife tool works. Here’s a link to the documentation:
http://mediawiki.blender.org/index.php/Manual/PartII/Edge_and_Face_Tools#Knife_Tool.2FCut_Type
In your case, perhaps you have the wrong edges selected, or you didn’t switched from “Exact” to “Midpoint” accordingly.
Hope this helps,
Cheers,
yeah i think i do have it all wrong. (i hate being a noob). but can anyone tell me how i would make insersions to make a simple eye shape, it would be greatly appreciated.
theres a decent face modelling tutorial on here somewhere ill see if i can turn it up 
You have to love google desktop, i found this so fast. Here is the tread on face modelling. https://blenderartists.org/forum/viewtopic.php?t=21066&postdays=0&postorder=asc&start=0
Read it till you find a link to the adriana video. You can get there reference pictures he uses from http://www.luxology.com/education/tutorials/character/modeling_a_head/, where there’s yet another head modelling tut, but not for blender.
Good luck and be sure to post your work.