Available for licensing and commercial development is a novel apertureless fiber-optic laser confocal design. Intraocular lens (IOL) dioptic power is a fundamental parameter where precise measurement is critical in characterizing and in evaluating the effectiveness and safety of IOL's. The present invention is a simple, accurate, objective, quick and relatively inexpensive method for IOL power measurement.
The invention incorporates an apertureless fiber-optic laser confocal design. A key feature of the design is a single-mode optical fiber coupler that simultaneously performs several essential functions. First, it provides effective launching and delivery of the input laser emission. Second, the fiber tip serves as a point light source used for formation of a collimated Gaussian laser beam profile for IOL testing. Third, the tip serves as a highly sensitive point receiver of the back reflectance laser emission. Fourth, the fiber coupler provides delivery of the spatially separated back reflected laser emission to a detector system. The combination of these unique features provides high accuracy (exceeding 1 μm) in spatially locating the IOL focal point and measuring the IOL power. This invention is also unique in that it allows for measurement of a wide range of both positive and negative powers including high-magnification IOL's with power greater than ±20 diopters. The simple and highly sensitive IOL power testing method provides the CDRH/FDA and the scientific community with an independent source of measurement data and information for evaluating the effectiveness and safety of novel IOL products.
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“Confocal laser method for quantitative evaluation of critical optical properties of toric intraocular lenses.” J. Cataract Refract. Surg. 2016 Mar;42(3): 455-61 PMID: 27063527
United States patent: US 7,719,668 B2, issued 05.18.2010
European patents in Switzerland, Germany, France, United Kingdom: EP 1864078, issued 05.03.2017
Product Area: Devices
FDA Reference No: E-2005-007
Whitney Hastings, M.S., Ph.D.
FDA Technology Transfer Program