深視力マスター is an educational app designed to simulate a real visual acuity test called the Three-Bar Method. After a brief introduction, the examination begins. Out of the three black bars displayed on the screen, only the center bar moves back and forth. Your task is to touch the screen when the center bar appears to be the same thickness as the side bars.

The yellow area below the black bars represents a side view of the bars. The direction closer to your point of view is labeled "近" (near), while the direction farther away is labeled "遠" (far). This serves as a reference to measure the discrepancy between your perception and the actual timing of your touch.

The test consists of three rounds, and passing requires getting at least two answers correct. If you wish to end the practice, simply press the "戻るボタン" (back button) and select "終了" (exit) to close the app.

The app can be used in both portrait and landscape orientations. Keep in mind that the difficulty level slightly increases in landscape mode, so if you are comfortable with the practice in portrait mode, consider challenging yourself in landscape mode as well.

Good luck with your real visual acuity test!