What is responsible for nourishing the inner layers of the retina?

The inner layers of the retina are primarily nourished by the retinal pigment epithelium (RPE) and the choroidal circulation. The RPE, located just outside the retina, provides essential support and nutrients to the photoreceptors, while the choroid, a vascular layer beneath the RPE, supplies oxygen and additional nutrients to the outer layers of the retina. This dual supply is crucial for maintaining retinal health and function.