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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. 6 — Jun. 13, 2007

Reduced-illuminance autofluorescence imaging in ABCA4-associated retinal degenerations

Artur V. Cideciyan, Malgorzata Swider, Tomas S. Aleman, Marisa I. Roman, Alexander Sumaroka, Sharon B. Schwartz, Edwin M. Stone, and Samuel G. Jacobson  »View Author Affiliations


JOSA A, Vol. 24, Issue 5, pp. 1457-1467 (2007)
http://dx.doi.org/10.1364/JOSAA.24.001457


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Abstract

The health of the retinal pigment epithelium (RPE) can be estimated with autofluorescence (AF) imaging of lipofuscin, which accumulates as a byproduct of retinal exposure to light. Lipofuscin may be toxic to the RPE, and its toxicity may be enhanced by short-wavelength (SW) illumination. The high-intensity and SW excitation light used in conventional AF imaging could, at least in principle, increase the rate of lipofuscin accumulation and/or increase its toxicity. We considered two reduced-illuminance AF imaging (RAFI) methods as alternatives to conventional AF imaging. RAFI methods use either near-infrared (NIR) light or reduced-radiance SW illumination for excitation of fluorophores. We quantified the distribution of RAFI signals in relation to retinal structure and function in patients with the prototypical lipofuscin accumulation disease caused by mutations in ABCA4. There was evidence for two subclinical stages of macular ABCA4 disease involving hyperautofluorescence of both SW- and NIR-RAFI with and without associated loss of visual function. Use of RAFI methods and microperimetry in future clinical trials involving lipofuscinopathies should allow quantification of subclinical disease expression and progression without subjecting the diseased retina/RPE to undue light exposure.

© 2007 Optical Society of America

OCIS Codes
(170.1610) Medical optics and biotechnology : Clinical applications
(170.3880) Medical optics and biotechnology : Medical and biological imaging
(170.4470) Medical optics and biotechnology : Ophthalmology
(170.4500) Medical optics and biotechnology : Optical coherence tomography
(170.4580) Medical optics and biotechnology : Optical diagnostics for medicine
(170.6280) Medical optics and biotechnology : Spectroscopy, fluorescence and luminescence

ToC Category:
Clinical Applications of Retinal Imaging

History
Original Manuscript: July 31, 2006
Revised Manuscript: September 21, 2006
Manuscript Accepted: September 26, 2006
Published: April 11, 2007

Virtual Issues
Vol. 2, Iss. 6 Virtual Journal for Biomedical Optics

Citation
Artur V. Cideciyan, Malgorzata Swider, Tomas S. Aleman, Marisa I. Roman, Alexander Sumaroka, Sharon B. Schwartz, Edwin M. Stone, and Samuel G. Jacobson, "Reduced-illuminance autofluorescence imaging in ABCA4-associated retinal degenerations," J. Opt. Soc. Am. A 24, 1457-1467 (2007)
http://www.opticsinfobase.org/vjbo/abstract.cfm?URI=josaa-24-5-1457

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