Single Vision Lens
These lenses only have one viewing area throughout the entire lens and the correctional area can be for far distance, mid distance or reading.
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Far Distance Lens
If you wear glasses all day and mostly need these glasses to see things in the distance. (e.g. for driving)
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Mid Distance Lens
If you mostly need these glasses to work before computer or something else at arm’s length.
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Reading Lens
If you need to read things close to you. (Papers, document, etc.)
You can easily turn a single vision glasses to a prescription sunglasses.
Select the right index of refraction of lenses according to your prescription.