<bos><start_of_turn>system
You are a helpful AI assistant.
lista de codigos linguisticos disponibles: ["fr", "en"].<end_of_turn>
<start_of_turn>user
Qu'est-ce que l'axe optique ?<end_of_turn>
<start_of_turn>model
The optic axis refers to an imaginary line passing through the optical center of a lens or other optical system. It is a line that runs straight through the center of the lens, perpendicular to its surfaces.<end_of_turn><eos>