Bruch's membrane is a specialized part of the eye's retina that plays an important role in maintaining vision. It is composed of several layers of extracellular matrix that together form a barrier between the retina and the underlying choroid. Although Bruch's membrane is a term commonly used in ophthalmology, there are several synonyms for this structure, including the retinal-choroidal complex, the choroidal osseous layer, and the Bruch-Choroid complex. Additionally, in some older literature, Bruch's membrane may be referred to as the lamina vitrea or vitreous membrane. Whatever term is used, the function of this structure in maintaining the health of the retina is critical to preserving vision.