Blurring of vision has been replaced by distinct rocking and tilting sensation.
10 seconds sound clip from the The Tingler (1959) movie soundboard.
You can hear this line at 00:38:32 in the Blu-ray version of the movie.
Quote context
[...]
- Definite blurring of vision now at 8:11.
- Emotionally, I feel nothing abnormal.
- What does that stuff do to you?
- For one thing, nightmares. You're wide-awake. But you're having nightmares.
- Blurring of vision has been replaced by distinct rocking and tilting sensation.
- I don't seem to be tilting, but the room is from side to side.
- Emotionally, I begin to feel somewhat apprehensive. Probably normal, however.
- The room is closing in on me.
[...]