1.67 Aspheric UV420 Blue Block Photo Grey Blue Cut Single Vision Lens Photochromic Blue Cut

1.67 Aspheric UV420 Blue Block Photo Grey Blue Cut Single Vision Lens Photochromic Blue Cut. UV420 Blue Cut Technology: Blocks UVA/UVB and filters HEV light (400-420nm) to prevent cataracts and AMD. Reduces Eye Strain: Filters short-wave blue light from screens to significantly reduce eye fatigue. Enhances Sleep Quality: Mitigates blue light impact on melatonin for better rest and refreshed waking. High Transmittance: Offers 98%-99% light transmittance for clear and sharp vision. Durable Resin Material: Crafted from lightweight, shatter-resistant CR39/Resin with anti-scratch coating. All-Weather Protection: Provides consistent UV protection even through clouds (60%) and rain (20-30%).