In-the-Spectacle-Lens Telescopic Device for Low Vision

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Figure 18: Simulation of the expectedappearance of the in-the-lens telescope.The proposed in-the-lens telescope can be used to simultaneously view the magnifiedimage and the unmagnified image of the same area. This vision multiplexing feature improveswearer orientation and navigation. The wearer can easily locate an object or determine therelative position of the object. The spectacle lens can include the wearer’s correctingprescription. We believe that these features will make this device very desirable and that theability to incorporate the wearer’s prescription using standard ophthalmic procedures will controlthe cost of the device and will support its wide distribution.ACNOWLEDGMENTSSupported in part by NIH grants EY 12890 and EY05957. F. Vargas-Martín received a travelgrant from Fundación Séneca, (Murcia, Spain). We thank Morey Waltuck for help with theconstruction of the Keplerian design with laminated lenses and, Gang Luo for help with theconstruction of the off-axis parabolic mirrors prototype.REFERENCES1. G.R. Watson, J. Maino and W. De L'aune, "Comparison of low-vision reading withspectacle-mounted magnifiers," Journal of Rehabilitation Research and Development,42/4, 459-470 (2005).2. E. Peli and W.P. Siegmund, "Fiber optic reading magnifier for the visually impaired,"Journal of the Optical Society of America A, 12/10, 2274-2285 (1995).30
3. R. Lund and G.R. Watson, The CCTV Book: Habilitation and Rehabiliation with ClosedCircuit Television Systems. The CCTV Book, LUVReading Series (Synsforum ans.,Froland, Norway, 1997)4. C. Dickinson, Low Vision: Principles and Practice (Butterworth, Oxford, 1998)5. H.A. Greene, R. Beadles and J. Pekar, "Challenges in applying auto-focus technology tolow vision telescopes," Optometry & Vision Science, 69/1, 25-31 (1992).6. E. Peli, "Vision multiplexing: an engineering approach to vision rehabilitation devicedevelopment," Optometry and Vision Science, 78/5, 304-315 (2001).7. E. Peli and D. Peli, Driving With Confidence: A Practical Guide to Driving With LowVision (World Scientific, Singapore, 2002)8. A.R. Bowers, D.H. Apfelbaum and E. Peli, "Bioptic telescopes meet the needs of driverswith moderate visual acuity loss," Investigative Ophthalmology & Vision Science, 46/1,66-74 (2005).9. A. Simon, "Fernbrille," Germany patent 302387 (1917).10. B.Q. Jones, "Goggles," USA patent 1,610,553 (October 31, 1924, 1924).11. J. Bartschat, "Brillenartige Haltevorrichtung fur Doppelfernrohne," Germany patent 863423 (1953).12. W. Feinbloom, "Driving with bioptic telescopic spectacles," American Journal ofOptometry & Physiological Optics, 54(1), 35-42 (1977).13. T. Harkins and J.H. Maino, "The BITA telescope: a first impression," Journal of theAmerican Optometric Association, 62/1, 28-31 (1991).14. A. Nguyen, A.-T. Nguyen, R.P. Hemenger and D.R. Williams, "Resolution, field of view,and retinal illuminance of miniaturized bioptic telescopes and their clinical significance,"Journal of Vision Rehabilitation, 7, 5-9 (1993).15. J.P. Szlyk, W. Seiple, D.J. Laderman, R. Kelsch, J. Stelmack and T. McMahon,"Measuring the effectiveness of bioptic telescopes for persons with central vision loss,"Journal of Rehabilitation Research and Development, 37/1, 101-108 (2000).16. H.A. Greene and J. Pekar, "Bioptic telescope utilization survey," Journal of VisionRehabilitation, 1/3, 39-48 (1987).17. R.T. Jose, L.A. Spitzberg and C.L. Kuether, "A behind the lens reversed (BTLR)telescope," Journal of Vision Rehabilitation, 3, 37-46 (1989).18. L. Spitzberg, R.T. Jose and C.L. Kuether, "Behind the lens telescope: A new concept inbioptics," Optometry and Vision Science, 66, 616-620 (1989).19. H.A. Greene, J. Pekar, R. Brilliant, P.B. Freeman, H.T. Lewis, R. Siwoff, C. Paton, D.J.Madden and R. Westlund, "The Ocutech Vision Enhancing System (VES): Utilizationand Preference Study," Journal of the American Optometric Association, 62/1, 19-27(1991).20. D.R. Williams, "The bi-level telemicroscopic apparatus--(BITA)," Problems inOptometry, 3/3, 495-503 (1991).21. W.F. Hoeft, "The microspiral galilean telescope," Problems in Optometry, 3, 490-494(1991).22. W.M. Ludlam, "Clinical experience with the contact lens telescope," Am. J. Optom.,37/7, 363-372 (1960).23. T.R. Willis and V. Portney, "Preliminary evaluation of the Koziol-Peyman teledioptricsystem for age-related macular degeneration," European Journal of Implant andRefractive Surgery, 1, 271-276 (1989).24. I.L. Bailey, "Critical view of an ocular telephoto system," The CLAO Journal, 13/4, 217-221 (1987).25. E. Peli, "The optical functional advantages of an intraocular low-vision telescope,"Optometry and Vision Science, 79/4, 225-233. (2002).31
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In-the-Spectacle-Lens Telescopic Device for Low Vision

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