Related Experiment Video
Updated: Aug 14, 2026
A Workflow to Quantitatively Determine Age-Related Macular Degeneration Lesion-Specific Variations in Fundus Autofluorescence
Published on: May 26, 2023
Autofluorescence imaging of choroidal neovascularization due to age-related macular degeneration
Samantha S Dandekar1, Sharon A Jenkins, Tunde Peto
1Moorfields Eye Hospital and Institute of Ophthalmology, London, England. sam@hitbits.co.uk
Objective:
To describe the autofluorescence (AF) characteristics of choroidal neovascularization (CNV) in patients with age-related macular degeneration.
Methods:
Autofluorescence images of 65 consecutive eyes with CNV at various stages of evolution were analyzed. Twenty images were of recent-onset CNV (group 1), 8 were of eyes 1 to 6 months after CNV diagnosis (group 2), and 37 were late-stage CNV (group 3). Autofluorescence images from groups 1 and 2 were compared with fundus fluorescein angiographic images.
Results:
Group 1 showed areas of hyperfluorescence on fundus fluorescein angiography corresponding to areas of normal AF in 16 of 20 cases, with adjacent areas of increased AF in 13 cases. The main areas of abnormal AF were larger than the main areas of abnormal fluorescence on fundus fluorescein angiography in 18 of the 20 cases. Groups 2 and 3 showed areas of decreased AF corresponding to areas of previous leakage on fundus fluorescein angiography (in group 2) or atrophy.
Conclusions:
Preserved AF in group 1 indicates viable retinal pigment epithelium initially, which has implications for visual prognosis. Decreased AF in groups 2 and 3 indicates loss of retinal pigment epithelium and photoreceptors. Autofluorescence imaging may increase our understanding of CNV in age-related macular degeneration.
Insights
Autofluorescence imaging reveals preserved retinal pigment epithelium in early choroidal neovascularization (CNV) but decreased autofluorescence in later stages of age-related macular degeneration (AMD). This technique aids in understanding CNV progression and visual prognosis in AMD.
Area of Science:
- Ophthalmology
- Medical Imaging
- Retinal Diseases
Background:
- Choroidal neovascularization (CNV) is a hallmark of advanced age-related macular degeneration (AMD).
- Understanding the evolution of CNV and its impact on retinal pigment epithelium (RPE) is crucial for visual prognosis.
Purpose of the Study:
- To characterize the autofluorescence (AF) patterns associated with choroidal neovascularization (CNV) in patients with age-related macular degeneration (AMD).
- To correlate AF findings with different stages of CNV evolution and compare them with fundus fluorescein angiography (FFA).
Main Methods:
- Analysis of autofluorescence (AF) images from 65 eyes with CNV at various stages.
- Categorization into recent-onset (group 1), intermediate (group 2), and late-stage (group 3) CNV.
- Comparison of AF images with fundus fluorescein angiographic (FFA) images for groups 1 and 2.
Main Results:
- Recent-onset CNV (group 1) showed normal AF in 16/20 cases, with adjacent increased AF in 13/20 cases. Abnormal AF areas were larger than abnormal FFA areas in 18/20 cases.
- Groups 2 and 3 exhibited decreased AF, correlating with previous leakage on FFA (group 2) or atrophy.
- AF imaging demonstrated distinct patterns corresponding to the stage and activity of CNV.
Conclusions:
- Preserved AF in early CNV suggests viable RPE, indicating a potentially better visual prognosis.
- Decreased AF in later stages signifies RPE and photoreceptor loss.
- Autofluorescence imaging offers valuable insights into the pathophysiology and progression of CNV in AMD.
