Which structure marks the boundary between the anterior and posterior hyaloid regions?

Which structure marks the boundary between the anterior and posterior hyaloid regions?

• A. Vitreous base
• B. Patellar fossa
• C. Berger's space
• D. Hyaloideocapsular ligament of Weiger

Answer: (A)

The border between the front (anterior) and back (posterior) surfaces of the vitreous is defined by the hyaloideocapsular ligament of Weiger. This circular ligament connects the posterior lens capsule to the anterior hyaloid membrane, forming the boundary that separates the anterior hyaloid from the posterior hyaloid. It sits at the retrolenticular region and helps delineate Berger’s space, the potential space between the posterior lens capsule and the anterior vitreous face. The vitreous base lies elsewhere, at the periphery where the vitreous adheres to the retina and ciliary body, and does not mark this boundary.