Scientific experiments have proved that: in the dark the optic cell membrane has a certain degree of permeability to sodium ions, the optic cell electrostatic potential is relatively in a partially depolarized state; in the light the optic cell membrane permeability to sodium ions is reduced, the depolarization decreases to the point that the cell tends to hyperpolarization. The distribution of cone cells decreasing and rod cells increasing from the central retinal recess outward to the periphery corresponds to the Tyndall effect and the Larman effect produced by the vitreous organic fluid on photons entering the eye. The human eye retinal receptive field central concave – peripheral orange resistant cone, rod cell organization way, is conducive to the retinal receptive field to abandon the green background, pumping up the yellow foreground information. Therefore, the textbook page bottom color is designed for the sodium photoelectric effect of the red limit value of 540nm near the green, the text color is designed for the sodium atomic spectrum of the main line system of 580nm near the yellow, you can reduce the textbook page color of the dry light pollution, increase the prevention of myopia function. Optic rod cells in the green light wavelength range appears to be extremely sensitive value ( [English] p. Borel’s “Introduction to Photochemistry” Science Press 1987, 1st edition). Because green light waves into the eye after the vitreous body is easy to be scattered, and yellow light waves into the eye can be directly through the vitreous body to stimulate the cone cells, so the human eye is particularly sensitive to yellow paper light waves easily burned. It is reported that the new version of the inner core of the workbook is anti-myopia yellow paper, such as holding the workbook too close to the eyes, the eyeballs will have a feeling of swelling.