If, like me, you often stay up late, finding yourself in a dark, quiet house, with the rest of the family asleep, then you are probably accustomed to moving about stealthily and not really needing much in the way of light to do so. I almost never turn lights on when moving about the house, and I have a couple of night vision tips:
1. Peripheral vision is more light sensitive than your focal point. This is because rods are more sensitive to light than cones, and (probably; I’m no ophthalmologist) your fovea has a high density of cones and therefore fewer rods than the surrounding retina.
2. To preserve night vision when you have to turn a light on, simply open just one eye. Use just one eye to do stuff in the light, and the other eye will keep its night vision adjusted to darkness.
Indeed! See : http://thalamus.wustl.edu/course/eyeret.html
I’d hire you for lookout on my boat 🙂
Ahh, but answer me this, o wise one. How do you take a leak ? Surely not with the lights off or with one eye closed.