Paragon Vision Sciences, Inc. HDS HI 1.54 HDS HI 1.54

HDS HI 1.54 (pahrifocon A) rigid gas permeable contact lenses for daily wear are available as lathe cut contact lenses with spherical, aspheric, bifocal or toric anterior and/or posterior, or bitoric surfaces in clear and tinted versions. the posterior curve is selected as as to properly fit an individual eye and the anterior curve is selected to provide the necessary optical power in correct refractive error. A peripheral curve system on the posterior surface allows tear exchange between the lens and the cornea.The HDS HI 1.54 rigid gas permeable contact lens material is a thermoset copolymer derived from acrylated, silicone acrylate, and fluorosilicone acrylate monomers, dimers and oligomers. The HDS HI 1.54 rigid gas permeable tinted lenses offer a handling aid for locating the lens and may be plasma treated.