Low-Cost Non-mydriatic Color Video Imaging of the Retina for Nonindustrialized Countries

  • Bernhard Höher
  • Georg Michelson
  • Peter Voigtmann
  • Bernhard Schmauss
Chapter

Abstract

Tele-ophthalmology requires low-cost devices that are easy to use and robust. A new imaging method was invented and applied, which is capable of acquiring wide-field color fundus images with 68 × 18° field of view at pupil sizes of only 2 mm. As a consequence there was no need for pupil dilatation or darkened examination rooms. Furthermore, many images could be taken in immediate succession, and videos could be acquired, which is not possible with many conventional non-mydriatic fundus cameras. We realized a demonstrator that could be produced for about 5,000 US$. It is relatively robust against mechanic shocks, because it internally has only one moving component. The camera was tested successfully at 27 subjects.

References

  1. 1.
    Everdell NL, Styles IB, Calcagni A, Gibson J, Hebden J, Claridge E. Multispectral imaging of the ocular fundus using light emitting diode illumination. Rev Sci Instrum. 2010;81:093706.PubMedCrossRefGoogle Scholar
  2. 2.
    Dick M, Mohr T, Bublitz D. Einrichtung und Verfahren zur Beobachtung, Dokumentation und/oder Diagnose des Augenhintergrundes. Patent DE 19626443. 2005.Google Scholar
  3. 3.
    Rassow B, Wesemann W. Moderne Augenrefraktometer. Stuttgart: Ferdinand Enke; 1984.Google Scholar
  4. 4.
    Cornsweet TN, Crane HD. Accurate two-dimensional eye tracker using first and fourth Purkinje images. J Opt Soc Am. 1973;63:8.CrossRefGoogle Scholar
  5. 5.
    Helmholtz H. Beschreibung eines Augenspiegels zur Untersuchung der Netzhaut im lebenden Auge. Berlin: A. Förstner’sche Verlagsbuchhandlung; 1851.CrossRefGoogle Scholar
  6. 6.
    Ruete TTG. Der Augenspiegel und das Optometer für practische Aerzte. Göttingen: Verlag der Dieterichschen Buchhandlung; 1852.Google Scholar
  7. 7.
    Bublitz D, Müller L, Mohrholz U, Mohr T, Teige F. Fundus camera with strip-shaped pupil division and method for recording artefact-free, high-resolution fundus images. Patent WO 2012/059236. 2011.Google Scholar
  8. 8.
    Pomerantzeff O, Webb RH, Delori FC. Image formation in fundus cameras. Invest Ophthalmol Vis Sci. 1979;18(6):630–7.PubMedGoogle Scholar
  9. 9.
    Heacock GL. Portable fundus viewing system for an undilated eye. Patent US 5861939. 1999.Google Scholar
  10. 10.
    Feldon S, Yoon G. Compact ocular fundus camera. Patent US 7802884. 2010.Google Scholar
  11. 11.
    Tran K, Mendel TA, Holbrook KL, Yates PA. Construction of an inexpensive, hand-held fundus camera through modification of a consumer “point & shoot” camera. Invest Ophthalmol Vis Sci. 2012;53(12):7600–7.PubMedCentralPubMedCrossRefGoogle Scholar
  12. 12.
    Höher B, Voigtmann P, Michelson G, Schmauss B. Non-mydriatic, wide field, fundus video camera. In: Manns F, Söderberg PG, Ho A, editors. Proceedings of the SPIE Photonics West, 1–6 Feb 2014. San Francisco: SPIE; 2014. p. 89300K.Google Scholar
  13. 13.
    Martin A, Koch B. Digitale Astrofotografie: Grundlagen und Praxis der CCD- und Digitalkameratechnik. Erlangen: Oculum; 2009.Google Scholar
  14. 14.
    Kowa Optimed Europe Ltd. Specification sheet of product “Kowa nonmyd-α D” [Internet]. 2014. Available from: http://www.kowa.eu/medicals/en/nonmydaD.php.

Copyright information

© Springer-Verlag Berlin Heidelberg 2015

Authors and Affiliations

  • Bernhard Höher
    • 1
    • 2
  • Georg Michelson
    • 3
  • Peter Voigtmann
    • 4
  • Bernhard Schmauss
    • 2
  1. 1.Department of Electrical EngineeringLehrstuhl für HochfrequenztechnikErlangenGermany
  2. 2.Institute of Microwaves and Photonics, University of Erlangen NurembergErlangenGermany
  3. 3.Department of OphthalmologyInterdisciplinary Center of Ophthalmic Preventive Medicine and Imaging, Friedrich-Alexander University Erlangen-NürnbergErlangenGermany
  4. 4.Voigtmann GmbHNürnbergGermany

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