This is the 4535th most frequent French word.
lunettes
Glasses (for vision).
Here, 'lunettes' refers to the optical device used for vision correction or to aid reading.
Elle porte des lunettes pour lire.
She wears glasses to read.
In this context, 'lunettes' indicates 'lunettes de soleil', specifying sunglasses used for protection against sunlight.
J'ai besoin de lunettes de soleil à la plage.
I need sunglasses at the beach.
Here, 'lunettes' refers metaphorically to the lenses of the microscope, demonstrating an extended usage of the term.