Gradient glasses are darker at the top of the lens where the sky is viewed and transparent at the bottom.
They usually come in bright colors with colored lenses and can be purchased cheaply.
Divide by 2 When you've added the two numbers together, divide the sum by two and that's your pupillary distance.
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Mirrored lenses of different colors can expand the range of fashion styles.
See clearly with these impact resistant lenses.
However, if the cornea is not as smooth, clear or round as it should be, or the eyeball is too long or too short, light rays will bend or refract at odd angles, leading to blurry or distorted vision.
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