Indeed, there are all sorts of odd individual perception issues - I even see slightly different colours in each eye, most noticeable with pale creams, etc - probably due to the start of a cataract.
Trust nobody - not even yourself.
An odd one that I accidentally found, when trying to fix a disaster at work once, is that your vision doesn't all operate in the same time-frame. The centre is processed faster, as it is more likely to be important, I suppose.
I needed to illuminate an object down a small, long hole - this meant having the torch right next to my eye - when I turned it on, the object lit up just before the torch did, apparently. The processing delay is short, only just perceptible, but it was very obvious when it happens 'in the wrong order'