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Virtual Journal for Biomedical Optics

Virtual Journal for Biomedical Optics

| EXPLORING THE INTERFACE OF LIGHT AND BIOMEDICINE

  • Editor: Gregory W. Faris
  • Vol. 2, Iss. 9 — Sep. 26, 2007

Thin spectacles for myopia, presbyopia and astigmatism insensitive vision

Zeev Zalevsky, Shai Ben Yaish, Oren Yehezkel, and Michael Belkin  »View Author Affiliations


Optics Express, Vol. 15, Issue 17, pp. 10790-10803 (2007)
http://dx.doi.org/10.1364/OE.15.010790


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Abstract

The aim of the presented research was to develop special spectacles capable of solving common ophthalmic problems as myopia, presbyopia and regular/irregular astigmatism. The method included adapting special all-optical extended depth of focus concept, taken from the field of digital imaging, to ophthalmology, and by that providing the required vision solutions. Special thin mask containing annular like replicated structure (thickness of the structure is less than one micron) was designed and proven to provide extended depth of focus. In this paper we present several experimental results as well as trials with volunteers. The testing included measuring the visual acuity under different illumination conditions (pupil size varied from 2 up to 4mm), as well as stereoscopy, color integrity, field of view and contrast. The results demonstrate improvements of up to 3 Diopters (for presbyopic that require the bifocal or the progressive lens solutions) for pupil sizes of 2–4mm. The approach has demonstrated improvement of more than 2 Diopters for regular as well as irregular astigmatism. The main advantage of the developed optical element is that it is very thin (less than few microns) and has low price, it has high energetic throughput and low chromatic aberrations and it operates over the full field of view while providing continuously focused image (in contrast to bifocal lenses having only 2 focused regions). The element also provides a solution for regular as well as irregular astigmatism that currently has no available treatment.

© 2007 Optical Society of America

OCIS Codes
(170.4470) Medical optics and biotechnology : Ophthalmology
(330.4460) Vision, color, and visual optics : Ophthalmic optics and devices

ToC Category:
Vision, color, and visual optics

History
Original Manuscript: April 23, 2007
Revised Manuscript: June 19, 2007
Manuscript Accepted: August 3, 2007
Published: August 13, 2007

Virtual Issues
Vol. 2, Iss. 9 Virtual Journal for Biomedical Optics

Citation
Zeev Zalevsky, Shai Ben Yaish, Oren Yehezkel, and Michael Belkin, "Thin spectacles for myopia, presbyopia and astigmatism insensitive vision," Opt. Express 15, 10790-10803 (2007)
http://www.opticsinfobase.org/vjbo/abstract.cfm?URI=oe-15-17-10790


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References

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