Monday, November 14, 2016

Blue Light Filter Lens Technology: Who Wore It Best?

Blue Light Filter Lens Technology: Nature

Are there blue light filters found in nature? In 1980, the NASA Jet Propulsion Laboratory conducted a 7-year study of optics for space exploration. While conducting nature studies, they found droplets of oil in the eyes of eagles and hawks. This oil not only blocks out UV and HEV light, but also enhances vision and increases depth perception.

Blue Light Filter Lens Technology: Advantage #2

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!