最終更新日：2025/12/04
The Hermann grid is an optical illusion in which ghostly grey blobs are perceived at the intersections of a light-coloured grid on a black background.
正解を見る
The Hermann grid is an optical illusion in which ghostly grey blobs are perceived at the intersections of a light-coloured grid on a black background.
音声機能が動作しない場合はこちらをご確認ください
編集履歴（0）
