Charlottesville, VA-based cataloger Gold Violin, which sells gifts and other items for seniors, has entered into a licensing agreement with Lighthouse International, a nonprofit organization for older people suffering from vision impairment. Until last summer, New York-based Lighthouse had mailed its own catalog. Now Gold Violin is offering a selection of products carrying the “Lighthouse Seal of Approval.” A portion of the sale of Lighthouse-labeled products will support the nonprofit group.