Update cheatsheet.en.md

01.curriculum/01.physics-chemistry-biology/03.Niv3/02.Geometrical-optics/01.geometrical-optics-general/01.geometrical-optics-validity/02.geometrical-optics-domain-of-validity-overview/cheatsheet.en.md

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 #### Geometrical optics lets us understand :
 
 * The **Vision**
-* **Optical instruments** : * magnifiers, telescopes, astronomical or terrestrial glasses, microscopes, cameras with telephoto lenses and zoom *
+* **Optical instruments** : * magnifiers, telescopes, microscopes, cameras with telephoto and macro lenses*
 * **Eyeglasses and contact lenses** to correct vision defects.
 * Optical phenomena such as **fog, rainbows, mirages**.
 * The operation of a **fiber optic**.