A simple VRChat shader avatar addon that dims bright areas of the screen. It does not prevent strobing, though the Blackout option can help a lot in some circumstances.
VRCFury is required for simple installation. GestureManager is recommended for easy testing.
Installation instructions: https://youtu.be/9bgPG3DkSvw
Do not expect support; this is a free asset for my own use that I'm sharing freely. You are free to improve it yourself if you want.