I LOVE my 2017 Prius v Four but I have had a real problem with liking the visibility of the road ahead from the headlights. IIHS rates it as "Poor" and, after more than a few years of driving it, I have to agree. After searching for help with this I finally thought I'd gotten a grip on headlight adjustment, but there was still a bit of confusion. I'd watched videos where between the bad video, vague explanations and the thick accents I gave up on that. Then there is the clockwise-counter-clockwise confusion which I hope this post will clarify. Adjustment is amazingly simple with a little understanding and explanation. The two photos below show the location of the adjustment on the rear of the non-LED headlight housings. These points are easily accessible. Below is a closer view of the adjustment often referred to as a bottle cap with a bolt head on it. If you use the 8mm bolt to adjust it you need to turn the disc (as viewed from the face of the bolt head) counter-clockwise to raise the beam, clockwise to lower it. If a phillips tip is used ( I used a #3, a #2 might be better? ) to make the adjustment the tip needs to be rotated clockwise to raise, counter-clockwise to lower the beam. Here's the tool I used, a speed wrench with an extended #3 phillips driver tip. I thought it to be easier and faster than a wrench or a screwdriver. This pdf link gave me parameters for proper adjustment: https://www.fhwa.dot.gov/publications/research/safety/humanfac/04148/04148.pdf (page 10) I hope to do the final adjustment tonight but it's not easy for me to find a spot that's dead level from the four wheels of the Prius to the point of measurement. Hopefully you can sort your way through this mess of messages and pictures.
That use case for a Philips driver, common for headlight adjustments, is one of the greater kludges seen in automotive ‘engineering’.
