Frame Material: PC. Magnification Strength: Strength 0x ~ 4.0x. Lens Material: Resin. Type: Cat Eye Multifocal Reading Glasses. Style: Fashion, Classic. Lens Technology: Blue Light Blocking, Progressive Multifocal. Progressive multifocal glasses are designed for far, intermediate, and near vision. The degree of the middle area changes gradually. Most people need about a week of adaptation. Package Included: 1 x Reading Glasses.