IOL Materials

IOL Materials

Each intraocular lens manufacturer faces a series of complex choices in deciding which material(s) to use for the production of intraocular lenses. The choice of materials includes: PMMA (Polymethyl methacrylate) Silicone (molded, using Optoform 80 or Nanoform 250) Hydrophobic polymers Hydrophillic polymers Factors in the choice of material include: Biocompatibility of the material with the […]

Hard Contact Lenses

Hard Contact Lenses

GP MATERIALS SGP I (Designed for gas permeable lenses using thin designs, allowing increased comfort without sacrificing sharp vision or oxygen permeability) Refractive Index: 1.471 Wetting Angle :30 DK: 19 Specific Gravity : 1.130 Hardness: 84 D SGP II (Designed for gas permeable lenses, providing an excellent balance between increased oxygen permeability and lens stability. […]

Mold Insert Materials

Mold Insert Materials

Molding ophthalmic lenses is a complex process which requires the combination of (a) significant experience in machining precision molds / inserts (b) extensive expertise in polymerization processes, and (c) combining both of the above with successful ophthalmic lens designs in a controlled and repeatable molding process. Non-ferrous metals: Most molds / inserts are manufactured in […]

Electro-Optics Materials

Electro-Optics Materials

(Materials for machining with monocrystalline diamond) Electo-optics manufacturers require complex geometries combined with dimensional accuracy in the sub-micrometre range. The optical surface qualities needed are beyond the limits of conventional cutting tools. However, ultra-precision machining using single crystalline diamond tools allows: the manufacture of complex geometries surface roughnesses in the nanometer range dimensional accuracies in […]