Thomas Frank breaks down the math in a video. Basically our eyes take so long to move and refocus, then read. The lines added by the chrome extension give you a target for your eyes to help practice using your periferal vision, requiring fewer eye movements to read a line.
http://fourhourworkweek.com/2009/07/30/speed-reading-and-acc...
Thomas Frank breaks down the math in a video. Basically our eyes take so long to move and refocus, then read. The lines added by the chrome extension give you a target for your eyes to help practice using your periferal vision, requiring fewer eye movements to read a line.
https://youtu.be/jv2BdHXRD3Q