To provide a displaying method on an electronic screen for observation power training for repeating adjustment of a sight line, an angle of convergence, and a focus.

The displaying method of an electronic screen for sight training is provided by performing either cross method by simultaneously displaying right and left images with almost the same shape on an electronic screen, wherein an observer looks at the right image by the left eye and the left image by the right eye or a parallel method wherein an observer looks at the right image by the right eye and the left image by the left eye in order to make the observer recognize a pseudo-stereo-image by an imagination fusing function of the visibility and the brain. When areas of the right and left images are small, both images are displayed at mutually close distance so as to make both right and left eyeballs of the observer move as time elapses by enlarging areas of the right and left images to integral times as large as the pixel areas on the electronic screen and setting the areas at a distance mutually apart by integral times.

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