C338 Fog diffusion

My brain went blank from lack of oxygen, and I regained consciousness after inhaling pure oxygen.

But why can't I see what's in front of my eyes after regaining consciousness? I clearly saw Cang Ling standing by my side, but I couldn't see her face. Had my eyes just been broken?

Cang Ling's voice sounded beside my ears:

"Master, are you alright? Do you still feel stuffy and breathless? Master