Progressive Multifocal Lightweight Reading Glasses Zero Magnification on Top LensAnti Blue Light Resin Lens CR39

1684 Black 1684 Black Gold. Progressive lenses-Progressive no-line bifocals have multiple magnification powers all in one lens. They allow you to see distance, intermediate, and near or even more than one field at the same time depending on where you point your eyes. The top part is what they designate as interacting, which basically means it s used for looking straight ahead at people you are conversing with. The middle part is used for computer purposes like your laptop, tablet, or another digital device. The bottom part is for reading materials like books, magazines, and other documents. Crystal Clear CR39 Resin Lens-Petofi reading glasses has optical, strong, durable frame and clear CR39 Resin Lens. The CR39 lenses are clear enough. This sturdy reading glasses have A-class clear lenses which have higher precision as well, makes the vision clear, give you a very big and sharp view, Hard Multi-coated CR39 Lens were reflective and scratch resistant lens, this reader glasses have 1.0x,