That's an interesting question. There are
several components to vision. For example, how
sharp you see things is referred to as visual
acuity. This is not just determined by your
eye (the retina, more specifically), but is also a
function of the visual cortex in your
brain! Another useful component of vision is
depth perception. This means how well you
judge how close or far things are compared to
their actual distances in the physical world.
Individuals with lighter eye color might be
more sensitive to brightness. However, this
probably does not affect things like visual acuity
or depth perception.