Which structure forms the innermost boundary of the retina facing the vitreous?

Which structure forms the innermost boundary of the retina facing the vitreous?

• A. Internal Limiting Membrane
• B. External Limiting Membrane
• C. Retinal Pigment Epithelium
• D. Outer Limiting Membrane

Answer: (A)

The innermost boundary of the retina facing the vitreous is formed by the Internal Limiting Membrane. This structure is essentially the basement membrane on the inner retinal surface, created by the endfeet of Müller glial cells, and it directly contacts the posterior hyaloid of the vitreous. Because it lines the retina from the inside, it sits at the interface with the vitreous, making it the outermost boundary that the vitreous encounters. The other options reside either deeper within the retina (the external and outer limiting membranes) or on the outer side of the retina next to the choroid (the retinal pigment epithelium), not at the interface with the vitreous.

The innermost boundary of the retina facing the vitreous is formed by the Internal Limiting Membrane. This structure is essentially the basement membrane on the inner retinal surface, created by the endfeet of Müller glial cells, and it directly contacts the posterior hyaloid of the vitreous. Because it lines the retina from the inside, it sits at the interface with the vitreous, making it the outermost boundary that the vitreous encounters. The other options reside either deeper within the retina (the external and outer limiting membranes) or on the outer side of the retina next to the choroid (the retinal pigment epithelium), not at the interface with the vitreous.