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The Ability Of The Lens To Accommodate . Few People Have A Pair Of Eyes That Show Exactly Equal Refractive Characteristics; One Eye May Need A "Stronger" Lens Than The Other.
Corrective Lenses Bring The Image Back Into Focus On The Retina. They Are Made To Conform To The Prescription Of An Ophthalmologist Or Optometrist.
Corrective Lenses Are Used To Correct Refractive Errors By Bending The Light Entering The Eye In Order To Alleviate The Effects Of Conditions Such As Nearsightedness (Myopia).
Glasses Are Worn For Eye Protection In Some Sports, Such As Squash.Glasses Wearers May Use A Strap To Prevent The Glasses From Falling Off.
The Eyes As Well As In The Lenses. Some Types Of Safety Glasses Are Used To Protect Against Visible And Near-visible Light Or Radiation.
A Lensmeter Can Be Used To Verify The Specifications Of An Existing Pair Of Glasses. Corrective Eyeglasses Can Significantly Improve The Life Quality Of The Wearer.
The Most Common Type Of Corrective Lens Is "Single Vision", Which Has A Uniform Refractive Index. For People With Presbyopia And Hyperopia, Bifocal And Trifocal Glasses.
Provide Two Or Three Different Refractive Indices, Respectively, And Progressive Lenses Have A Continuous Gradient. Lenses Can Also Be Manufactured.
Pinhole glasses are a type of corrective glasses that do not use a lens. Pinhole glasses do not actually refract the light or change focal length. Instead, they create a diffraction limited system.
Photochromic Glasses Are Blacked Out Or Lightly Tinted In Dark Or Indoor Conditions, But Turn Into Sunglasses When They Come Into Contact With Ultraviolet Light.
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