I thank you for showing us very clearly references to legislators and regulators.
I must say that the misunderstanding I mentioned above was referred to the fact that at the time of the interview, the CO could be pointed disability, which may be obvious, but you can not have health care needs, but it might make him think of the opposite , and on this point I had many doubts about how to answer it if required.
medical visits are made before the interview, but visits are not complete: for example, tend to exclude the presence of viruses, or to ascertain mental illnesses, which are the main targets for anyone who has to admit foreigners as permanent residents, but not of other body functions, such as blindness, deafness, paralysis, etc. ....at least so I think those who think asking a medical before the interview.
excuse me if I write bad English, I do not know if I wrote it correctly, but I hope I have expressed my thoughts on the subject well!