is this a glitch?

[ChasingCoyote]

I've only seen videos of the vanilla game finale, not played myself yet ....til I tried just now. none of the vids I've watched dealt with this problem, when you get to where Rais yells at you from above youir vision should clear and then you deal with all the virals and run! but me....no....I'm stuck in that seizure vision and can't see anything....so I run...like I've seen in the videos, but I can't SEE anything...nothing....I'm jrunning blind....got to the zipline, and STILL can't see anything.... totally bumming me out... wtf IS this? why is the game hating on me?