ADD, or attention deficit disorder is a disorder that makes someone loose attention. You could use attention deficit.
Another word for "lack of interest" is apathy or indifference. These both basically refer to a person who is uninterested, unresponsive or impassive. Another word to describe this sort of person could also be perfunctory.
incommunicado
Inaction??
lacking skill
Harsh truth
be without
Another word for the focus is the EPICENTRE (or if you are American the EPICENTER!) Of course the epicentre and focus are different in that one is on the ground and the focus is underground.
concentration
Another word for "lack of interest" is apathy or indifference. These both basically refer to a person who is uninterested, unresponsive or impassive. Another word to describe this sort of person could also be perfunctory.
Lack, want,
incommunicado
Inaction??
lack dearth
lethargic
lacking skill
Harsh truth
Lazyness