Advantage #2 of
blue light filter lenses: Blue light filter glasses greatly reduce harmful
HEV light and keep your eyes healthy.
1.
Depth
Perception
How do eyes perceive depth?
Here are some of
the many ways:
I.
Binocular vision: Most open-plain herbivores lack this
vision because their eyes are on the sides of their head, providing a
panoramic, almost 360° view of the horizon. This enables them to notice the
approach of predators from almost any direction. However, most predators have
both eyes facing forward, allowing binocular depth perception and helping them
to judge distances when they pounce or swoop down onto their prey.
II. Motion parallax: The relative motion of objects against a
background helps greatly with depth perception. This is why birds bob their head.
III.
Depth from motion: When an object moves towards the
observer, its velocity and the optical expansion gives the brain cues as to the
relative distance.
IV.
Perspective: Another visual cue of relative distance
is when objects, such as a road, get narrower as they fade into the distance.
V.
Relative size: Objects have a recognizable size that
helps the brain triangulate distance when compared to other objects.
VI.
Texture gradient: As we lose sight of texture on objects,
the brain knows their distance is likely further away.
VII.
Lighting and shading: Both lighting and shading are valuable
cues to gauge distance.
VIII.
Convergence: When two eyes focus on the same object,
they perceive distance separately when within 10 meters of the object. This
difference sends relevant cues to the brain.
The haze caused from blue light can
inhibit all of these processes from working effectively!
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