I tried the Spritz link up to 700 wpm, after closing the page my eyes felt weird for a while. This may be due to the black background and the fact that I was fo

I tried the Spritz link up to 700 wpm, after closing the page my eyes felt weird for a while. This may be due to the black background and the fact that I was focusing a lot on the text, but in any case I would not recommend it...