Refraction Websites:

  • traceytechnologies.com

    Tracey Technologies - Ray-tracing Wavefront Aberrometry for Eye Care

    Developer and manufacturer of advanced vision analysis and diagnostic devices for ophthalmologists, eye surgeons and doctors, including iTrace.

  • richardfisher.com

    Optical Engineering, Lens Design, Photonics, Consultant: Richard Fisher

    Optical engineering consulting. All aspects of optical and photonic engineering. Based in Ann Arbor, Michigan. Design and prototype manufacture.

  • hasgeo.com

    Hasbrouck Geophysics, Inc.

    Complete domestic and foreign geophysical consulting and contracting for the mining, groundwater, environmental and engineering industries

  • seistronix.com

    SEISTRONIX Exploration Seismographs

    Seistronix manufactures, leases and sells exploration seismographs and related geophysical equipment for oil, gas, mineral and general geotechnical exploration

  • interpex.com

    Interpex Limited - Specialists in PC Based Geophysical Software

    Specialists in PC Based Geophysical Software for 1D, 2D forward and inverse modeling.

  • cigem.ca

    Gemology World – Canadian Institute of Gemmology

    Dedicated to research and advance in education in the field of gemmology. Gemlab Research & Technology. Gemological Books and Instruments. Professional Development.

  • bomg.org

    Berkeley Ophthalmology Medical Group, Inc.