2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/5467We present an overview of the cosmic shear results obtained so far. We focus on the 2-point statistics only. Evidences supporting the cosmological origin of the measured signal are reviewed, and issues related to various systematics are discussed.replaced with updated summary table, proceedings of the XVIIIth IAP Colloquium, 'On the Nature of Dark Energy', July 1-5, 2002Astrophysicstext