With Which Dioptre Do You Look at the World? is a philosophical novel that explores how perception shapes our reality. Through the eyes of the main character, Leonid, we follow a journey spanning social and political changes in Poland, from the fall of communism to contemporary challenges. Leonid's profound reflections and questions about the nature of truth, the power of empathy, and the limitations of our perception resonate through generations, inspiring people to challenge their assumptions and see the world with fresh eyes. The novel raises fundamental questions about human existence and invites readers to continually seek deeper understanding of themselves and the world around them.