My character goes blind

I recommend trying the following:

• Reinstall all mods that could be even remotely related (if you have any)
• Just wait a few minutes. The game could resolve it by itself
• Look for a mod on the Nexus to patch it
• A fresh save. I know you're level 48, but it might be worth creating a new save just to test if it's a problem with the save or with your game
• Make your own mod with the Creation Kit. The game engine uses several classes of effects when performing an action like turning you into a werewolf. I would look for the MagicEffect involved and disabling any particle effects or visual effects inside

If none of these work, then I don't know what will.