diff --git a/01.curriculum/01.physics-chemistry-biology/03.niv3/02.geometrical-optics/07.optical-instruments-design/topic.en.md b/01.curriculum/01.physics-chemistry-biology/03.niv3/02.geometrical-optics/07.optical-instruments-design/topic.en.md
deleted file mode 100644
index 8377292b4..000000000
--- a/01.curriculum/01.physics-chemistry-biology/03.niv3/02.geometrical-optics/07.optical-instruments-design/topic.en.md
+++ /dev/null
@@ -1,7 +0,0 @@
----
-title: 'Understand, size and characterize optical instruments'
-published: false
-visible: false
----
-
-Là, on reprends les démonstrations, qui font que en considérent les conditions de gauss
\ No newline at end of file
diff --git a/01.curriculum/01.physics-chemistry-biology/03.niv3/02.geometrical-optics/07.optical-instruments-design/topic.es.md b/01.curriculum/01.physics-chemistry-biology/03.niv3/02.geometrical-optics/07.optical-instruments-design/topic.es.md
deleted file mode 100644
index 8d169630e..000000000
--- a/01.curriculum/01.physics-chemistry-biology/03.niv3/02.geometrical-optics/07.optical-instruments-design/topic.es.md
+++ /dev/null
@@ -1,7 +0,0 @@
----
-title: 'Entender, dimensionar y caracterizar instrumentos ópticos'
-published: false
-visible: false
----
-
-Là, on reprends les démonstrations, qui font que en considérent les conditions de gauss
\ No newline at end of file
diff --git a/01.curriculum/01.physics-chemistry-biology/03.niv3/02.geometrical-optics/07.optical-instruments-design/topic.fr.md b/01.curriculum/01.physics-chemistry-biology/03.niv3/02.geometrical-optics/07.optical-instruments-design/topic.fr.md
deleted file mode 100644
index 210cd3595..000000000
--- a/01.curriculum/01.physics-chemistry-biology/03.niv3/02.geometrical-optics/07.optical-instruments-design/topic.fr.md
+++ /dev/null
@@ -1,7 +0,0 @@
----
-title: 'Comprendre, dimensionner et caractériser les instruments optiques'
-published: false
-visible: false
----
-
-Là, on reprends les démonstrations, qui font que en considérent les conditions de gauss
\ No newline at end of file