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Visual equipment for checking close vision working distance

  • US 6,325,508 B1
  • Filed: 12/23/1999
  • Issued: 12/04/2001
  • Est. Priority Date: 09/24/1999
  • Status: Expired due to Fees
First Claim
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1. A spectacle system comprising:

  • an optical system having at least one corrective lens through which a wearer of the spectacle frame views objects, wherein the optical system has a fixed optical power with respect to time; and

    a telemetry device attachable to the optical system to determine the distance between the optical system and a viewed object.

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