it is Design to Help eyes With Blurry Vision, Rainbow, EyeGlasses, Spectrum, Virtual image, they are people who see well up close, Convex- Sighted, Concave- sighted, Near-sighted, Far-sighted, They are people who see well from away, Near-sighted, Convex- Sighted, Far-sighted, Concave- sighted, what types of lens is this?, Positive Lens, Convex Lens, Converging Lens, Concave Lens, What types of Lens is this?, Negative Lens, Convex Lens, Concave Lens, Diverging Lens

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