Sorry to hear abt your light sensitivity problem. You have my utmost sympathy. Been there and lived in the dark like a mole months on end. No idea what The Experts might say. Did read Dr Nicholas Silver, whose pretty eminent in UK, suggested always cutting back to level you didn’t get the side effects for a week or two and then trying again. That of course referred generally to side effects not specifically light sensitivity though. Guess it all just depends on what and how much of what a person feels they can tolerate. However as light sensitivity, if extreme, impacts so much on quality of life one needs to think long term psychological effects etc.
I read three things cause light sensitivity: migraine, some medications and Anxiety.
Betablockers can cause light sensitivity, generally indirectly because they can Dry Eyes main symptom of which is light sensitivity. That happened to me. Treat with artificial non-medicated tears in eye drop form from optician or use warm compress 3-4 times a day. Just sit with warm damp cloth over eyes 10/15 minutes. To start with wetter is better. That helps open the tear ducts maximum. Watch ambient humudity because that will make a difference too. Do check in a mirror to see if your pupils are dilated or better still get someone else to look deep into your eyes as the mirror might make you feel queer.
I remember reading your ‘better with one eye closed’ post. Of course that cuts light entering eyes by 50%. Have you been to your eye plp yet? Must admit I think, if it was me, I’d want to safely quit the drugs until I’d seen them. I carried on with the betablockers anyway. They could have made my light sensitivity worse from the start. Was so ill anyway I doubt ‘I’d have noticed but eventually Propranolol more or less stopped mine and interestingly my eyes aren’tdry anymore except when humidity very low and as long as I do warm compress once a day. I can actually look at the sunshine again, Helen