
Think your eyesight is sharp? Most can't reach 20 points. Find the different colored square in a 10x10 grid. Start with 5 seconds. Correct +1 sec, wrong -1 sec. Color differences get extremely subtle. Mouse-only, windowed mode, perfect for quick breaks. Helps train color vision.
Overview
Think your eyesight is sharp? Most can't reach 20 points. Find the different colored square in a 10x10 grid. Start with 5 seconds. Correct +1 sec, wrong -1 sec. Color differences get extremely subtle. Mouse-only, windowed mode, perfect for quick breaks. Helps train color vision.
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空之歌:每当磁针再次振动,我便在此等待

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