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Related Experiment Videos

Issues in quantifying atrophic macular disease using retinal autofluorescence.

Janet S Sunness1, Matthias D Ziegler, Carol A Applegate

  • 1Richard E. Hoover Rehabilitation Services for Low Vision and Blindness, the Greater Baltimore Medical Center, Maryland 21204, USA. jsunness@gbmc.org

Retina (Philadelphia, Pa.)
|July 11, 2006
PubMed
Summary

Autofluorescence imaging shows potential for identifying geographic atrophy (GA) and Stargardt disease scotomas. However, differentiating drusen from atrophy in GA may require additional imaging methods like fundus photography or macular perimetry.

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Area of Science:

  • Ophthalmology
  • Medical Imaging
  • Retinal Diseases

Background:

  • Autofluorescence imaging is a non-invasive technique used to assess retinal health.
  • Geographic atrophy (GA) and Stargardt disease are progressive retinal disorders affecting central vision.

Purpose of the Study:

  • To evaluate the utility and limitations of autofluorescence imaging in identifying and delineating areas of atrophy in macular disorders.
  • To compare autofluorescence imaging findings with other methods like fundus photography and scanning laser ophthalmoscope (SLO) macular perimetry.

Main Methods:

  • Case series comparing fundus photographs, SLO imaging, SLO macular perimetry, and SLO autofluorescence imaging.
  • Inclusion of patients with geographic atrophy (GA) from age-related macular degeneration, pigmentary alteration of the retina, and Stargardt disease.

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  • Primary outcome measure was the presence of reduced autofluorescence.

    • Main Results:

    • Autofluorescence imaging can identify areas of GA with reduced autofluorescence, though drusen may sometimes obscure or mimic atrophy.
    • In Stargardt disease, decreased autofluorescence effectively detects and delineates scotomas.
    • Areas of reduced autofluorescence can persist without developing atrophy, and mottled autofluorescence may indicate functional deficits impacting fixation.

    Conclusions:

    • Reduced autofluorescence is a valuable indicator for delineating atrophy in macular disorders.
    • For GA, combining autofluorescence with fundus photography or macular perimetry is crucial for distinguishing drusen from atrophy.
    • In Stargardt disease, autofluorescence patterns can correlate with visual function deficits.