Blood flow pattern in eye before development of type 3 macular neovascularization

Area of Science:

• Ophthalmology
• Medical Imaging
• Retinal Diseases

Background:

• Type 3 macular neovascularization (MNV) is a significant cause of vision loss.
• Early detection of MNV is crucial for timely intervention.
• Optical coherence tomography angiography (OCTA) visualizes retinal vasculature.

Purpose of the Study:

• To characterize the blood flow patterns in eyes preceding the development of type 3 MNV.
• To identify pre-exudative signs of type 3 MNV using OCTA.

Main Methods:

• Retrospective analysis of 10 patients with unilateral type 3 MNV.
• OCTA imaging of the deep capillary plexus (DCP) and outer retina (OR) was performed.
• Blood flow was assessed at MNV onset and 6 months prior.

Main Results:

• Abnormal blood flow signals (non-exudative MNV) were detected in the DCP and/or OR in 8 of 10 eyes before exudation.
• Exudation occurred approximately 3.5 months after the appearance of non-exudative MNV.
• All fellow eyes that developed MNV showed type 3 characteristics.

Conclusions:

• Non-exudative MNV is detectable by OCTA before exudation in type 3 MNV.
• This pre-exudative stage offers a window for earlier therapeutic strategies.
• Understanding the origin and progression of MNV is enhanced by these findings.