Presolicitation notice: The Department of Defense is seeking to procure optical lenses and ancillary items for use by U.S. soldiers, sailors, airmen, and marines worldwide. The lenses being solicited include single-vision, semi-finished, bi-focal, and ST-28 lenses, while the ancillary items include lens cleaners and cloths. The solicitation is part of a Multiple Award Schedule program and aims to establish long-term contracts for delivery to Department of Defense hospitals, clinics, and other federal customers. The estimated 5-year value of the contracts is $24,420,400.00, with a maximum forecasted value of $48,840,800.00. Proposals can be submitted during the open periods of the solicitation, and the solicitation is expected to be issued around April 19, 2019. All responsible sources may submit a proposal and will be considered by the Agency.