PC Blurred vision effect

My level 49 assassin has been a vampire for more than half his time in Skyrim - recently though he was attacked, outside during the day, and since that point the screen has been completely and permanently blurry. The only vampire related mods I'm using are Predator Vision and Dynamic Vampire Appearance, I've tried disabling both of them and it has no effect.

I've also tried disabling other mods that may cause similar effects - Frostfall and Realistic Needs & Diseases. There are no active effects (and console command to remove spells does nothing) listed and using night vision (or predator vision) works as expected, but retaining the blurred effect - ie, brightness increases. I've tried removing and adding vampirism using the console (setrace command) and that doesn't change it either.

Eating various poison ingredients, drinking potions, sleeping and being exposed to sunlight again have no effect. Whilst the game is playable (just), if this is a permanent thing I'll have to go back to a previous save.

Anyone got any more ideas to avoid me losing quite a few hours of play?

The first thing that came to my mind was Frostfall's screen blur effect having glitched, but I see you already checked that.
Hmm... I found a thread about a similar problem, and quite a few solutions suggested there. However, it's on LoversLab and there's a pretty NSFW gif posted in the thread. Not surprising considering it's the dreaded LL, but means I'm not posting a link.

If you google "skyrim permanently blurred vision" it's the first hit. Was for me, anyway.

PS. Are you by any chance using Important Information Overhaul? Cause if you are, its low-stamina effect may be stuck.

I was going to mention Important Information Overhaul, but I see Wippii beat me to it.

Are you running an ENB? Depth of Field might be set too high.

That's a weird one. If you haven't installed all of the "unofficial" patch files for the main game and each DLC you own, you might try it as there might be something in one of those that just happens to fix the problem.

Have you installed any mods around the time this started to happen? Many times something like that is a conflict between mods or a conflict with a mod and ENB.

If you load an old file or create an entirely new character but keep any mods you have loaded, active, does the problem carry over to your different game or does it only affect your most recent saved game?

Thanks, some helpful suggestions here.

Nothing new installed. I was using the ENB "speed boost" only, but the same effect happens without that. I'm using a lot of mods, but this has been stable for this playthrough and I can pinpoint the exact time it happened (frost troll on the walk to High Hrothgar), but don't have saves just before. Going back to a previous save doesn't have the effect.

I think I can pin this down to an image space modifier - using the toggle SetImageSpaceModifiersEnable 0 removes that effect, along with other useful ones. Unfortunately there doesn't seem to be a simple method to list current, active image space modifiers so I'm working through the list of possible ones (courtesy of the search mentioned with the NSFW image) that I've retrieved from a Tes5edit search and using RemoveImageSpaceModifier against each one.

I feel like there should be an easier way to do this like removing modifiers without disabling them.

This probably won't do anything, but you might try this as a friend of mine said he fixed some different graphics problem with it.

Go ahead and disable the modifiers (make a backup copy or write down exactly what you change) and then load up your save game that has the issue. Make a new save file for it assuming you are in the state of not having the blur issue. Exit the game. Revert your image space modifier changes you made earlier back to the original settings.

Then launch your newly created save game file and see if the problem has migrated to the new save file. I kind of expect the new file will have the same issue, but if it's a simple instance of a corrupt file, trying the above idea might overwrite that.

For anyone interested my method worked - I created a batch file for use with the console and the command "RemoveImageSpaceModifier" followed by the few hundred modifiers that I'd got from TES5EDIT. I couldn't find an easy way to export the list, so typed them in to the file. Once run in skyrim it worked.