The 2026 National Ophthalmology Congress (CNO26) will be held from Wednesday, April 15th to Friday, April 17th, 2026 at the Hilton Hotel in Buenos Aires. It is organized by the Argentine Council of Ophthalmology (CAO) and supported by all the country's ophthalmology societies and departments. Primarily aimed at Spanish-speaking ophthalmologists, CNO26 will also bring together surgical technicians, vision rehabilitation specialists, and administrators related to the specialty, and will feature a large commercial exhibition area.