Paragon Thin contact lenses from Paragon Vision Sciences are gas permeable lenses designed to be worn as daily wear lenses and replaced after up to a year of use.  Depending on advice from an eye care practitioner, some patients may be able to wear them as extended wear lenses for up to a week.  The posterior curve is selected so as to properly fit an individual eye and the anterior curve is selected to provide the necessary optical power to correct refractive error. A peripheral curve system on the posterior surface allows tear exchange between the lens and cornea.  Paragon Thin lenses are manufactured with a visible tint to assist in locating them in the solution.


Lens Material
The Paragon Thin rigid gas permeable contact lens material is 100% Polymer (paflufocon D); a thermoset copolymer derived from fluorosilicone acrylate monomers.


Lens Parameters
Chord Diameter: 7.0 to 10.5mm
Center Thickness: 0.05 to 0.70mm
Base Curve: 6.50 to 9.00mm
Powers Daily Wear: -20.00 to +12.00 Diopters
Bifocal Add Powers: +0.25 to +4.00 Diopters
Monocentric Bifocal Add Diameter: 4.0 to 9.0mm
Monocentric Bifocal Prism: 1.0 to 2.5 Diopters
Concentric Bifocal Add Diameter: 2.0 to 4.0mm

Lens Properties
Refractive Index: 1.463(Nd at 25 deg. C)
Luminous Transmittance: (Clear) 99%
(Sapphire Blue) 94%
(Emerald Green) 95%
Wetting Angle: (Receding Angle) 12.8 deg.
Specific Gravity: 1.45
Hardness (Shore D): 85.3
Water Content: < 1%

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