What type of CNV lesion is characterized as a classic lesion occurring in the subretinal space?

Type 2 CNV (choroidal neovascularization) lesions are specifically characterized as classic lesions that develop in the subretinal space. These lesions arise from the choroidal blood vessels and penetrate the retinal pigment epithelium (RPE), leading to the formation of a distinct membrane below the retina. This type of CNV is typically associated with a higher degree of leakage and more prominent subretinal fluid accumulation, which can be visualized on imaging studies such as fluorescein angiography.

In the context of age-related macular degeneration (AMD), Type 2 CNV is often linked to the exudative phase, where there can be significant visual impairment due to the effects of the neovascularization on the surrounding retinal structures. Understanding the classification of CNV types is essential for diagnosis and treatment options.