Foster Grant Blue Light eReaders Mens 2.5 Everything You Need to Know About How to be a Foster Parent FosterUSKids 3 Ways Becoming A Foster Parent Will Change Your Life For The Better Tennessee Centerstone Families. Foster Grant Blue Light eReaders are designed to reduce eye strain from digital screens. Featuring patented lens technology, they filter blue violet light and offer 100% UVA UVB protection. Ideal for professionals and students, these glasses combine style with functionality, available in various shapes and colors. Key Features Filters at least 30% of blue violet light 100% UVA UVB lens protection Anti reflective coating Impact resistant lenses Scratch resistant lenses Adjustable nose pads Spring hinges Lightweight frames