diff --git a/01.curriculum/01.physics-chemistry-biology/03.Niv3/02.Geometrical-optics/05.paraxial-optics/02.paraxial-optics-simple-elements/03.lens/02.lens-overview/cheatsheet.es.md b/01.curriculum/01.physics-chemistry-biology/03.Niv3/02.Geometrical-optics/05.paraxial-optics/02.paraxial-optics-simple-elements/03.lens/02.lens-overview/cheatsheet.es.md
new file mode 100644
index 000000000..db15d49fb
--- /dev/null
+++ b/01.curriculum/01.physics-chemistry-biology/03.Niv3/02.Geometrical-optics/05.paraxial-optics/02.paraxial-optics-simple-elements/03.lens/02.lens-overview/cheatsheet.es.md
@@ -0,0 +1,5 @@
+---
+title : "towards thin lens overview"
+published: false
+visible: false
+---
\ No newline at end of file