Those who either have it themselves or are related to someone (particularly if it is chronic) are better about understanding than others. The best was a coworker who had a daughter with chronic. He knew the lights were triggering me, so he had them change the lighting around my desk and put up some card board over a window right behind my screens. Unfortunately, he retired and his replacement is the opposite. But the job gives me 18 sick days separate from vacation as well as good insurance, so I have to put up with it.