Which type of CNV is associated with retinal hemorrhage?

Type III Retinal Angiomatous Proliferation (RAP), often referred to as type III CNV, is associated with retinal hemorrhage due to its vascular characteristics. In this type of neovascularization, new blood vessels grow from the retinal vasculature into the superficial layers of the retina. This is distinct from other types of choroidal neovascularization that typically arise from deeper layers of the choroid.

The nature of type III RAP causes it to be more prone to complications such as bleeding, which can lead to retinal hemorrhage. As the abnormal blood vessels proliferate and leak, they can disrupt the retinal structure and lead to significant bleeding into the retinal layers, causing visual disturbances and further retinal damage.

In comparison, other types of CNV, such as Type I and Type II, may not typically present with the same degree of hemorrhage, as they originate from different layers and have different clinical presentations. Polypoidal choroidal vasculopathy also has its own distinct characteristics and potential complications but is less commonly associated with retinal hemorrhage than type III RAP.