diff --git a/01.curriculum/01.physics-chemistry-biology/03.Niv3/02.Geometrical-optics/05.paraxial-optics/02.paraxial-optics-simple-elements/03.lens/06.lens-transverse-1/.gitkeep b/06.lens-level-down/.gitkeep
similarity index 100%
rename from 01.curriculum/01.physics-chemistry-biology/03.Niv3/02.Geometrical-optics/05.paraxial-optics/02.paraxial-optics-simple-elements/03.lens/06.lens-transverse-1/.gitkeep
rename to 06.lens-level-down/.gitkeep
diff --git a/01.curriculum/01.physics-chemistry-biology/03.Niv3/02.Geometrical-optics/05.paraxial-optics/02.paraxial-optics-simple-elements/03.lens/07.lens-transverse-2/.gitkeep b/07.lens-level-up/.gitkeep
similarity index 100%
rename from 01.curriculum/01.physics-chemistry-biology/03.Niv3/02.Geometrical-optics/05.paraxial-optics/02.paraxial-optics-simple-elements/03.lens/07.lens-transverse-2/.gitkeep
rename to 07.lens-level-up/.gitkeep