The medical term for your condition is: You're stuffed.
Presumably you had to do the signal gun test because you failed the Ishihara and Farnsworth lantern tests. The signal gun test has been replaced by the CAD test, which merely confirms what is already known. You have CVD.
That's why you've left a trail of death and destruction in your wake since gaining your ATPL.
Last edited by Lead Balloon; 19th Sep 2016 at 06:29.