• plastic frame
• plastic lens
• non-polarized
• Lens width: 50 millimeters
• ANTI BLUE LIGHT- Block blue light and relieve eye fatigue associated with digital screens
• BETTER SLEEP- Blue light reduces melatonin production which makes you sleepy. Less blue light = deeper sleep
• Standard Adult Shape Glasses. Measurement - 138mm frame width, 50mm lens width, 38mm lens height, 18mm bridge. Spring Hinge Design
• Package contain 4 blue blocking glasses as pictured.