Hi, I don't know the answer to your question, I just wanted to share something in case you hadn't tried it yet.

These are some tinted glasses that block blue light from screens and help from screen fatigue. I have some and they really help me for when I get migraines and can't look at screens anymore. If your light sensitivity is for any light at all these might not work, but if it's specifically screens (computer, phone, TV) these could help.