[quote=Leotamer]
I image they are, but are the vision wards warded from magic sense which my character has to a degree. Also, if something is hidden from magical sight, is it like it isn't even there or would the person know it is there but not sure what it is?
[/quote]

On the subject of the wards, the teachers personal wards are based around their living areas and several classrooms. Like Imp said, these Wards follow the latter, and it's difficult to discern exactly how far the wards can see.

On the topic of the Headmaster wards . . . you wouldn't be able to sense them at all. They're located so far away and interconnect with each other in such a way that even if you could sense them (highly unlikely) you wouldn't be able to tell them apart individually.