Horses' eyes do have cones, but most horses have only limited
color vision. They can usually perceive red and blue, but may
confuse some greens from shades of gray.
Are blue eyes to be preferred with a horse in general?
The color of a horses eyes has no bearing on anything
really.Blue eyes are caused by specific genetics.
Is it normal for horses to have weeping eyes in the spring?
yes, horses often get allergies from the new spring grasses and
pollen just like we do, It can cause their eyes to excessively
water it shouldn't be and issue but be sure its not impeding their
eyesight and that their eyes aren't red.