InSights- Observations and
Notations on Surgical Magnification
Updated 12/12/96
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The Source for Information about Surgical
Ergonomics! Information update by Brent Downs, Designs For Vision, Inc.
Opinion article by Dr. Lance M. Rucker |
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Who's End-Running Whom?-- New Designs from Orascoptic and Designs For Vision
by Dr. Lance M. Rucker
December 13, 1996
The two most prominent producers of surgical telescopes, Orascoptic and Designs For Vision, have each just released new telescope designs which seem to be aimed at the other’s market.
Orascoptic, which has captured over 30% of the dental surgeons’ market based on its flip-up telescopes (according to a Clinical Research Associates newsletter survey of October, 1995), began production of a through-the-lens system in late summer, 1996. Taking aim at Designs’ huge market in through-the-lens custom-made surgical telescopes, Orascoptic touts the light weight and choice of two declination angles (20° and 30°) as selling points of its new product line.
Designs For Vision, reported to be in use by 33% of the same market, has just released its new flip-up telescopes during the final days of 1996. The advertised advantages of Designs’ new flip-ups include its comfort, light weight, and one-touch default positioning.
Both systems are undergoing modification and adjustments as the first units are being sold and field tested. Neither of these two new systems has been submitted for evaluation by STEP (Surgical Telescope Evaluation Program) yet, although both companies have announced intentions for formal evaluation in the New Year. Evaluation results, photos, and product comparisons will be included on-line at the SMWS as soon as they are available.
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How One Company Deals with Special Prescriptions in the Manufacture of Surgical Telescopes for Surgeons and Dentists
by Brent Downs, Designs For Vision, Inc.
January 3, 1997
The following is a brief description of what Designs For Vision, Inc. does to account for any type of prescription that a doctor would require in a Surgical Telescope System (ST).
DVI can build any type of prescription into the carrier lens (distance vision, near vision, bi-focal, high minus, and even prisms). The bi-focal design is referred to as an Executive Bi-focal, where the near and distance Rx span the width of the lens. The segment height can be set anywhere the doctor prefers; however, there is a standard setting that most prefer (approximately the bottom 2/3 of the lens is reserved for the near vision and the top 1/3 for the distance vision). DVI also offers high index lenses for those with high minus prescriptions.
DVI also builds the prescription into the telescope, including an astigmatic Rx if necessary. Because DVI customizes the working distance, it is necessary to build the Rx into the telescope in order to insure a proper working distance.
Special note: With the introduction of our flip-up design, DVI offers something that other manufacturers warn against. DVI can include any near vision Rx in the carrier lens and not have any effect on the working distance even when the near vision Rx changes. This is a patented design by DVI.
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How One Company Deals with Special Prescriptions in the Manufacture of
Surgical Telescopes for Surgeons and Dentists