Another big issue with medicals is the use of medications such as antidepressants. I know for a fact that there are many pilots taking antidepressant medications but not declaring this on their medical form in fear of having a permanent mark against their name which could haunt them in many years to come.
CASA would clearly prefer to have pilots with mental health issues like depression go undiagnosed and untreated rather than have pilots who are seeking the appropriate treatment for their illness.
Lets just hope that the day that CASA automatically gets access to your medical records never comes...