Everybody sees the world a little bit differently, and aside from the effect of our mental state the physical state we're in affects our vision in weird ways too, making our own unique view of the world even more unique.
Add vision factors like eye defects, injuries and vision imparing substances like drugs or alcohol and your sight just keeps getting weirder and weirder!
To understand what all these different physical states do to our eyes check out this Bright Side video, it isn't necessarily medically accurate but it will get you thinking about the factors that are affecting your vision.