How long does it take us to be aware of what we see?
In addition to only having a very limited sharp field of vision, our eyes are also fairly slow at registering changes in images compared to the update frequency of a modern computer screen. Research has shown that the retina needs to see a new image for about 80 ms before that image is registered in normal light conditions. This doesn’t mean that we consciously have noticed any changes—only that the eye has registered a change. The ability to register an image is also dependent on the light intensity of that image. This can be compared with a photographic camera where a short shutter speed in a badly lit environment results in a dark and blurred image, where hardly anything can be seen. However, when taking an image of something that is very well lit, e.g. a window, the shutter speed can be very short without