What I Learned from the Optometrist

[jerry i h]

Well, I could not resist: during my appt at the eye doctor, I asked about light.
NIGHT VISION.
What color is less likely to wipe out night vision? Color, apparently, does not matter. The intensity of the light needs to be reduced to a low enough level.
COLOR RENDITION.
Which light is less inaccurate: LED (bluish) or incan (yellowish)? Well, what you need is an LED designed with pure white light.
LUX vs. PERCEIVED INTENSITY
A little more unsure. He said that such things are well known, but from an eye scientist, and for a little reseach. Well, I did find this link:
http://www.siggraph.org/education/materials/HyperVis/vision/eye.htm (click on 'intensity')
Apparently, it is logarithmic, but only over small ranges.

 

[Marduke]

low level is most important for night vision, but your eyes can tolerate more red than any other color before it's destroyed.