IF humans could look at the world through the eyes of a horse they would be very disappointed. The human eye is an incredible instrument. For example the lens can alter shape almost instantly to change between long and short sight, we can see things in glorious Technicolor, and many of us have 20/20 vision. But the horse has none of these powers.

If good human vision is 20/20, a horse rates as 20/60. This means that details a person with 20/20 vision can see at 60m are only visible to a horse at 20m. They also probably only see things in fairly drab hues with no strong reds or greens, more shades of grey, yellow and brown.