My friend, Ingrid, sent this link to me and even though its supposed to be for engineers, I think the practiced eye of us folk what work in graphics should make this fun. My last score was 3.33 and I have the screen shot to prove it:
This is for all of the engineers out there.
There always seems to be a guy or gal who can look at something and tell you that a line or an angle is off. Now you can try your skill at using 'the eye'. This is tougher than it looks.
The game is not timed so, take your time. You will actual go through the exercises three times and the results are averaged. Just put your cursor on the little blue square to make the adjustments for whatever it is you are directed to do.
Make sure and compare your results to all others on the chart that is at the end. It is called a "distribution" chart and shows your score in comparison to a lot of others that have taken the test.
It is fun to test your eyeball accuracy.
http://woodgears.ca/eyeball/