I was hunting for info on red vs. green & came across
this article.
points of interest for those who want the abreviated version
COCKPIT ILLUMINATION
Red light was used for illumination of the cockpit in post-World War II aircraft because it, like red goggles, did not degrade dark adaptation. The intent was to maintain the greatest rod sensitivity possible, while still providing some illumination for central foveal vision. However, red cockpit lights interfered with reading maps and log books, especially for pre-presbyopic and presbyopic aviators. With the increased use of electronic and electro-optical devices for navigation the importance of the pilot's visual efficiency in the cockpit has increased and new concerns have arisen.
Low intensity, white cockpit lights are often used now because they afford a more natural visual environment within the aircraft, without degrading the color of objects.
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ENHANCING AND MAINTAINING DARK ADAPTATION
Red Goggles or Spectacles
For maximum utilization of scotopic vision, 20 to 30 minutes in total darkness are required to attain satisfactory retinal dark adaptation. An alternative is to have the aircrew member wear red goggles for 20 to 30 minutes before flying. When worn in normal illumination, red goggles will not interfere significantly with the ability to read most maps, charts, manuals, etc., as long as the printing is not in red ink. Red goggles block all light except red, which enhances rod dark adaptation because red light does not stimulate the scotopic system.
There are some drawbacks to wearing red goggles or using red cockpit lighting. When reading maps, markings in red on a white background may be invisible. Red light also creates or worsens near-point blur in older far-sighted, presbyopic (decreased near focusing ability due to age), and pre-presbyopic aircrew. Under red light or using red goggles in normal light, red light is focused behind the retina due to the optics of the eye and more "near focusing" than average must be used to provide a clear image when reading at near.
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RECOMMENDATIONS
The following are some ways for aviators to protect, improve, or maintain their operational night vision.
1. Complete a training course that emphasizes the inherent limitations of night vision
2. Keep spectacles, visors, and windscreens clean
3. Wear proper spectacle correction.
4. When practical, dark-adapt or use red goggles before night flying
5. Avoid bright lights, or at least protect one eye.
6. Do not fixate centrally, but scan and look 15-20 degrees to the side of the visual target.
7. Regularly wear sunglasses on sunny days, especially on days of night missions.
8. Eat an adequate diet that includes vitamin A.
9. Do not smoke.
10. Consider use of 100% oxygen at night, even at low altitudes.
and another titled
the red myth
cheers