What do the dark arrows in the diagram indicate?

In the context of ocular anatomy, the dark arrows indicating the trabecular meshwork and its relationship to the scleral spur and Schwalbe's line is significant for understanding the drainage of the aqueous humor from the anterior chamber of the eye. The trabecular meshwork functions as a filter for the aqueous humor, helping to maintain intraocular pressure by allowing the fluid to flow out of the eye.

By delineating this area, the arrows provide a visual representation of how the trabecular meshwork transitions from the scleral spur towards Schwalbe's line, which is crucial for identifying normal anatomy and recognizing potential issues in glaucoma and other ocular conditions. This understanding aids in both clinical evaluation and surgical planning when treating conditions that involve intraocular pressure management.

Recognizing these boundaries is fundamental in diagnostic sonography as it helps practitioners assess abnormalities in those structures that could lead to impaired aqueous drainage and elevated intraocular pressure.