It's specifically fast spinning objects that get me: I was spending a lot of time staring at a 3400rpm grinder wheel with a fine repeating pattern on it. If I'

It's specifically fast spinning objects that get me: I was spending a lot of time staring at a 3400rpm grinder wheel with a fine repeating pattern on it. If I'm just sitting typing on my laptop, even the 120hz ones don't bother me.