In order to meet this criteria for exemption the medical condition must result in a severe level of disability and/or social funtioning.
The Incapacity Benefit Handbook for Doctors gives the following examples of cases where there are severe and irreversible effects of the pathological process-
The guidance points out that the above is not an exhaustive list and goes on to state that the degree of dependency on others may be a useful indicator of the level of disability
