This is a SOURCES SOUGHT for Lenses Blanks to furnish eyelglasses to Veterans for Market Research purposes. Looking for Domestic end items (raw castings of lenses made in America) that can meet an est... This is a SOURCES SOUGHT for Lenses Blanks to furnish eyelglasses to Veterans for Market Research purposes. Looking for Domestic end items (raw castings of lenses made in America) that can meet an estimated (EST) 137,215 ophthalmic lenses per year. See the attached PWS and demand history for further information.