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Vascular network changes in the retina during ageing in normal subjects: a computerized quantitative analysis
M M Ciulla1, G Tortora, P Valentini
1Institute of Internal Medicine, Centro di Fisiologia Clinica e Ipertensione, Ospedale Maggiore Policlinico IRCCS, University of Milan, Italy. img.lab@mailserver.unimi.it
Summary
This study developed a computerized method to quantify retinal vascular damage, finding retinal arterial density correlates with age. This technique offers a reproducible way to track vascular changes during aging.
Area of Science:
- Ophthalmology
- Medical Imaging
- Biomedical Engineering
Background:
- Ophthalmoscopy is used for qualitative assessment of organ damage.
- Current methods lack reliable quantification of retinal vascular damage.
- A novel computerized technique was developed for quantitative fundus analysis.
Purpose of the Study:
- To develop a computerized technique for quantitative analysis of the fundus oculi.
- To enable objective measurement of retinal vascular parameters.
- To establish a tool for assessing age-related changes in retinal vasculature.
Main Methods:
- Retinal images from 68 healthy subjects were acquired using a non-mydriatic ophthalmoscope.
- A circular area (25% of fundus) was analyzed for arterial and venous density and arteriolar bifurcation angle.
- Measurements were performed by two blinded operators twice to assess reproducibility.
Main Results:
- Retinal arterial density showed a significant correlation with age.
- Arteriolar bifurcation angle was also measured.
- High intra- and interobserver reproducibility (2.5% and 3.2% CV) was achieved.
Conclusions:
- Computerized fundus analysis provides a simple and reproducible method for quantitative vascular assessment.
- This technique can identify changes in the retinal vascular network associated with aging.
- It offers potential for early detection of age-related vascular alterations.