Will it affect the eyesight system?
Just think of this like season two of that other thread... same topic same author, but maybe new characters.
If that were a problem then the cars would not come with intermittent wipers, and they would probably come with rain sensing wipers (the one piece of lazy technology I wish I had in my vehicles).A number of previous posts attempted to address this subject so recommend you do a search. My conclusion is that in rain it could easily add noise to the capturing of an image. This is due to the hydrophobic surface causing droplets of water to form. These will act like small lenses resulting in the detectors receiving scattered light with the images. Apparently this effect has not been reported/thought to detect an issue.
I just put on a layer of Glaco I had from years ago:I checked Japanese Subaru forum for last 7 years. They are saying using Rain-X type water repellant for eye-sight equipped windshield is not a problem. But they said we should use wiper more often. As long as wiper takes off small water pellets off the glass, they said it is ok. And also as silver onix said, apply it right.. buff buff buff.