One of the symptoms of ankylosing spondylitis is light sensitivity and it's a symptom that I do suffer from, some days it effects me more than others.
I do find that artificial lighting can cause me more problems with this, than a sunny day. So at times I either wear sunglasses inside, or if at home I will have the room that I'm in quite low lit as it causes less of a problem for me and this issue.
I have often been asked if I am alright, or get asked why I am sitting in the dark. It's not because I am depressed, or keeping in touch with my goth side, it's because I am having a day where having the room brightly lit is painful. If, on one of these days, someone enters the room and throws on the main light it causes me to act like a gremlin and flinch, closing, or covering my eyes. I have been known to do my ARP Warden impression telling people to turn the light out.
As I am writing this entry I am wearing a pair of my sunglasses, due to this symptom being rather problematic for me. I think that I have been one of the few people who have been quite glad that it's been overcast and gloomy and not a nice sunny autumn's day. Now it's night time and the lights are on in the house, I have had to put my shades on, they haven't been needed till now. I would rather be sitting in the dark than a brightly lit room, as it would be less painful.
So for now I have them on doing the 'rock star' look, not to try and look cool.