What Is Light Perception?

Light perception refers to the ability to perceive light only and not to recognize the shaking of a finger 1m in front of the eyes. Most blind people retain residual vision with light perception.

Light-sensitive

1. Can only perceive the light, but cannot recognize the shaking of the finger 1m in front of the eyes. most

The eyes can feel the light intensity of the light. The human eye is very sensitive, its absolute value is 0.3 billionths of a candle / square foot. complete

For general use, absolute brightness is not significant, and relative brightness is more meaningful. Relative brightness refers to the contrast relationship between light intensity and background, called

Light perception is not only related to the intensity of light, but also to the size of the light range, and is directly proportional to it.

The difficulty of distinguishing light is related to the difference between light and background, that is, the difference in brightness.

According to the characteristics of light perception, in visual design, if we want light or certain information composed of light to be easily felt by people, we should increase the difference between it and the background, and increase the area of light, otherwise, if we do nt The opposite should be done. The key is not the absolute brightness of the light, but the difference between it and the background and the size of the area.