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CR-39 Plastic Lenses
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Next - Select Single Vision, No-Line Progressive, Lined Bifocals or Trifocals
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Do you need Single Vision, Progressive no-line lenses, lined Bifocals or Trifocals?
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Below is a description of the different types of plastic lenses available for your glasses.
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Recommended prescription
range for CR-39 Plastic Lenses:
Sphere below + or - 1.00
Cylinder below + or - 1.00
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Select the lens that best describes the type you require.
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Plastic Single Vision
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Plastic Bifocals
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Plastic Trifocals
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Bifocal Lenses contain two different prescriptions in the same lens. The primary purpose of bifocal glasses is to provide an optimal balance between the top area of the lens and the lower segment area of the lens. Bifocal lenses are available in a variety of segment shapes and widths. The most popular bifocal segment style is the Flat-Top 28 also known as straight-top or D-segment.
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Trifocal Lenses contain three focal points, usually for distance, intermediate and near vision. A trifocal lens has an added segment above the bifocal for viewing objects in the intermediate zone, which is approximately arm's length away. Trifocal lenses are available in a variety of segment shapes and widths. The most popular trifocal segment style is the Flat-Top 7 by 28 also known as straight-top or D-segment.
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Plastic Computer Lenses
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No-Line Computer Lenses are an occupational progressive lens, a no-line multi-focal that corrects near, intermediate and, to a degree, distance vision. It has a larger intermediate zone than regular progressive lenses, leaving less space for distance. Computer eyeglass lenses are generally not suitable for driving or regular wear.
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