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
index b2fed0cc6..8377292b4 100644
--- 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
@@ -1,5 +1,7 @@
 ---
 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
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