In a similar vein, I can go one step further with reference of an Employer's ignorance of illness. Last year, after an Internal transfer from one division to another, involving moving a total of 500 miles, I discovered a Management Bullying & Intimidation culture at my new place of work. The previous 3.5 years counted for nothing and despite my best efforts to beat their "systematic bullying and humiliation" processes, within 4 months I was diagnosed by my GP with Severe Stress and Depression, and placed on medications to combat it.
However, my Medications regime effectively went out of the window as I battled to combat not only the stress but a totally disrupted Sleep pattern, when sometimes I'd go without sleep for up to 48 hours at a time! Luckily, I had Union representation; I say luckily, as my Employers worked on the format that not only did they not recognise Stress and Depression as illnesses, but also didn't allow for Diabetes - to them, these 3 illnesses (amongst others) were "all in the mind!".
Part of their bullying was to disallow me to have my Blood Testing Meter, strips etc., plus snacks which I had discreetly hidden away in a purpose made pouch in a coat pocket; meal times were disrupted oe even taken away by an utterly crazy shift pattern which was designed to seriously impact with me medically.
I was stuck deep in the Highlands of Scotland, couldn't afford to get away for job searching but equally couldn't afford to be out of work and it was a vicious circle. Ultimately, I walked out after the company tried to ban my Union Rep and legal team from representing me at hearings brought into the equation when illness, including Diabetic episodes, caused me to miss work.
My next move to an altogether utterly different employer demonstrated how the whole scenario could be and was handled. I am only sorry, in hindsight, that I didn't get out sooner than I did; equally, a great number of those colleagues I left behind have suffered in a similar way, such that some left under medical duress but some are still there to this day. Others in the same company at other sites are bullied to be back at work or face dismissal, literally days after having major medical surgery. Regrettably, some companies still exist in this day and age..... and seem to get away with it!