House is essentially quite literally a medical Sherlock Holmes, and while he formally specialised in infectious disease, he is clearly shown to be an expert in most medical fields, just like Holmes is an expert in all fields related to anything remotely related to the plot.
Also, a problem in colour vision would not be psychiatry, it would be ophthalmology first, but likely overall neurology (because if it’s just a colour vision issue and not an indication of something larger, it’s not a House episode).
House? Is not a psychiatrist. If House had a patient that dipped in and out of psychosis, House would look for tells like odd clothing choices.
House is essentially quite literally a medical Sherlock Holmes, and while he formally specialised in infectious disease, he is clearly shown to be an expert in most medical fields, just like Holmes is an expert in all fields related to anything remotely related to the plot.
https://house.fandom.com/wiki/Gregory_House_and_Sherlock_Holmes_connections
Also, a problem in colour vision would not be psychiatry, it would be ophthalmology first, but likely overall neurology (because if it’s just a colour vision issue and not an indication of something larger, it’s not a House episode).