Need your eyeballs to drive right? Well not according to the way alot of people drive. Especially at higher speeds or during maneuvering.
One initially comical but worrying incident happened when I was driving to Halifax earlier on this year. I was on the motorway and I could see two trucks just ahead, one in the left lane, other in the centre. Further ahead not more than about 100 meters away max was another two trucks again in the left and centre lanes. I was just behind this BWM in the right hand lane about to over take the lorries after the BMW. The BMW over takes the first two trucks and then suddenly lurches over to the left most lane even though there's these 2 other lorries right in front of him. Sure enough literally within 5 seconds of getting to the left most lane he then carelessly lurches to the right most lane!!! If he looked where he should be going ( these trucks were WELL within the distance you should be looking on the motorway!) he would have calmly stayed in the right hand lane. It gets me worried that there are people like this.
It's not just confined to looking ahead on the motorway. Try looking to the left before moving to the left. I was going onto Progress way in Blackpool after going to the Morrisons there (one by Blackpool airport) which is 2 lanes. I was driving parallel to this other car on their left as I was turning out the traffic lights when suddenly he decides to go to the left hand lane WITHOUT LOOKING!!! Fast reactions saved the day here. He didn't even indicate!!
I would have definately cracked my car once (and possibly twice) if I didn't look to the left. I was driving round the traffic island on the first junction on the M55 in Blackpool last year with a couple of friends and I was in the right hand lane for going all the way round to the right. Coming up to my turn off I checked around me and there was a car a bit behind me. I turned on my indicators and just started moving left when that car suddenly zoomed up and UNDER CUT ME! If he used his eyeballs he would have seen... MY INDICATOR... FOR LEFT.... you think I was angry! Well guess who was one of my passengers. Non other than our very own short tempered human inferno Delmorpha...

WRONG!!!!!!!

We happened to be going to the pub for lunch as well so that guy was put to rights there.

So next time
use your fookeeen eyeballs!