This is a discussion on This is how we can see in the dark within the Glow-On forums, part of the Vendors category; Very few people are aware of this, exception made of trained military personnel. Why is this information important? Well, knowledge is important.:D How to see ...
Very few people are aware of this, exception made of trained military personnel.
Why is this information important? Well, knowledge is important.:D
How to see in the dark.
In complete darkness the center of vision is a dark blind spot, that's why when we look directly at stars they disappear momentarily. Your glow sights disappear also when you look at them directly.
So, to "see" things in the dark, you don't look at them directly, you scan the area with your eyes using your peripheral vision which in turn is also our real night vision.
The cell around our center of vision is adapted to perceive maximum contrast, but not color, that is why we can't perceive color in the dark.
If you can perceive color in the dark, then some light is present.
If your glow sights appear dark or they seem to disappear, move your center of vision slightly to the side of your gun sights and they "reappear".
Human night vision kicks in after some time in the dark.
Avoid looking directly at light sources or your vision will turn to day vision.
At three or four O'clock in the morning, this is what your sights will look like:
Of course you can rekindle the Glow-On with a lamp in which case it will look like this:
Further more a good tactical lamp helps a lot. in fact training for low light shooting requires a lamp.
Three important points
The center of vision is relatively blind in a dark environment, there is a dark spot right there in low light conditions.
Gunsights or any other object placed in this area will disappear from our vision while in the dark.
Look slightly to one side left or right and the object or gun sights will reappear.
Center of vision is partially blind.
Peripheral vision is what we use to perceive objects in the dark.
We can't see much in the dark, glowing objects disappear.
Human vision works differently in a dark environment.
human vision uses mainly our peripheral vision to 'see'.
Peripheral vision is enhanced to see contrast or shapes more than color.
Direct Vision is calibrated to distinguish colors.
The iris is a muscle, it takes time for the iris to open adequately so we can see n the dark.
the same way we have to do some squats before we can flex our legs adequately.
Glow-on absorbs energy from the light and releases it in the form of 'afterglow' for a long period of time.
Just like filling a glass of water under the faucet and then sipping from it little by little until it's empty.
This is called a cycle, the cycle can be repeated millions of times during the half-life of the product which is 15 years.
Glow-On initial afterglow is much brighter than tritium, then it falls under that level, but still way above the threshold of visibility.
in other words, given the right conditions, as in you know how to use it, it will be visible for hours.
This information includes most information available, graphs will be updated from time to time.