Related Experiment Video
Updated: Sep 27, 2025
12:28
Quantification of Vascular Parameters in Whole Mount Retinas of Mice with Non-Proliferative and Proliferative Retinopathies
Published on: March 12, 2022
3.8K
Quantitative changes in iris vasculature and blood flow in patients with different refractive errors
Yanwen Jia1,2, Wenwen Xue3, Yulan Wang3
1Department of Ophthalmology, Shanghai General Hospital Affiliated Nanjing Medical University, Shanghai, China.
Summary
Iris microvascular changes, measured by vessel area density (VAD) and vessel skeleton density (VSD), correlate with refractive errors. Higher VAD and VSD near the pupil may indicate myopia development.
Area of Science:
- Ophthalmology
- Vascular Biology
- Refractive Error Research
Background:
- Refractive errors, such as myopia, are a significant global health concern.
- The microvasculature of the iris plays a role in ocular health, but its association with refractive errors is not well understood.
Purpose of the Study:
- To investigate the relationship between iris microvascular characteristics and refractive errors.
- To quantify iris microvasculature using optical coherence tomography angiography (OCTA).
Main Methods:
- A cross-sectional study involving 70 patients with refractive errors.
- Iris microvasculature was analyzed using OCTA, calculating vessel area density (VAD) and vessel skeleton density (VSD) in different iris regions.
Main Results:
- Iris microvasculature varied significantly across different regions, with higher VAD and VSD in the inner iris.
- Vessel density was higher in patients with emmetropia and mild hyperopia compared to those with moderate to high myopia.
- Increased spherical equivalent correlated with increased iris VAD and VSD.
Conclusions:
- Quantitative analysis of iris microvasculature shows a correlation with refractive errors.
- Changes in iris microvasculature may serve as an indicator for myopia development.
