Firstly, they aren't called nursing homes, as nurses can be few and far between. They are officially called long-term care (LTC) homes in Canada. Most of the work is done by personal support workers (PSW), a group which needs to be regulated, monitored, and trained consistently across Ontario.
Once you, or your family member, require a LTC setting to meet activities of daily living(ADL), you have to research homes, and choose up to 5. You can read more here. If these come up and you are offered a spot, protocols are in place. You must be careful if you turn down a spot.
In this case, a woman was offered a location in a dementia ward, which is absolutely ridiculous. She turned it down. They could have removed her name from the top of the list, but decided not to. Then, she was offered a room with a woman experiencing visual issues, who must live in the dark. As with anaphylactic peanut allergies, and other health issues, this kind of situation is only going to get worse in the future. Yet, as with entire schools who have chosen to not allow peanuts anywhere, punishing others for the sake of one is ridiculous.
Someone who needs a dark room should not be living in a double room. The home should be penalized for this, not the potential resident.