What is blue light? Blue light is high-energy light that screens emit that can have negative impacts on our health and wellness. What are the effects of blue light? Digital eye strain, which includes blurred vision, dry eyes, headaches, and eye fatigue.Sleep disruption, which includes difficulty getting to sleep and problems staying asleep. The Felix Gray Embedding Method Clear lenses Filters at highest energy (380-440 nm) Filters at peak screen emittance (455 nm) Filters sleep range (459-484 nm) Quality lenses and longevity Ophthalmic quality Faraday - Black Carver - Mahogany Haro - Gold Nash - Whiskey Tortoise Roebling - Amber Toffee Hamilton - Silver Buying Options Add to Cart Buying Options Add to Cart Add to Cart Buying Options Customer Reviews 4.1 out of 5 stars 129 4.3 out of 5 stars 41 — 4.3 out of 5 stars 52 4.2 out of 5 stars 39 3.7 out of 5 stars 13 Price $78.40$78.40 $98.00$98.00 — no data $78.19$78.19 $98.00$98.00 — no data Shape Rectanglar Rectanglar Square Square Circular Circular Material Acetate Acetate Metal Acetate Acetate Metal Fit Wide Medium Medium Medium Narrow/Medium Narrow/Medium Colors Available Black, Burnt Amber, Panorama Black, Mahogany Silver, Gold Whiskey Tortoise, Black Amber Toffee, Sazerac Crystal Silver, Gold Features 3-barrel hinge, Italian Mazzucheli acetate, Standard Nose Bridge 3-barrel hinge, Italian Mazzucheli acetate, Standard Nose Bridge Adjustable nose pads, 3-barrel hinges, German engineered metal Keyhole bridge, 3-barrel hinges, premium italian mazzucchelli acetate Keyhole bridge, 3-barrel hinges, premium italian mazzucchelli acetate Adjustable nose pads, 3-barrel hinges, German engineered metal Size 53-17-145 50-17-145 48-22-140 49-17-140 49-18-140 49-21-140