Research and cite the negative cognitive effects of bad design in a bona fide psychological context. Care about the person using the application. Quite appropriate in a medical context.
I care deeply about the user. If I cared less this wouldn't be a problem. :-) The differences are subtle and to someone who can't "see" the issues, they are for all intents, invisible.
It's a little like trying to tell the client that adding Corinthian style columns to the front of Craftsman style house isn't a great idea. The client literally can not see why that would be a bad idea.
It's a little like trying to tell the client that adding Corinthian style columns to the front of Craftsman style house isn't a great idea. The client literally can not see why that would be a bad idea.