• Blue light blocking: Reflects and filters blue light to prevent color distortion and improve sleep quality. • Durable lenses: Multi-layer coating of only 10 um that increases hardness and prevents scratches. • Classic design: Ultra-lightweight and universal frame that fits most face shapes. • Eye strain relief: Reduces symptoms such as dry eyes and eye heaviness, ideal for prolonged screen use. • Sleep improvement: Helps regulate the internal clock by blocking harmful blue light. • Product specifications: Frame width: 140 mm, Lens height: 30 mm, Lens width: 53 mm, Leg length: 140 mm. • Material: Polycarbonate frame and AC lens. • Includes: 4 reading glasses, 4 hard protective cases, 1 cleaning cloth, 1 glasses cord, 1 blue light blocking test card, and flashlight.