What do the dark arrows in the diagram indicate?

The dark arrows in the diagram indicate the delineation of the trabecular meshwork from the scleral spur towards Schwalbe's line. This anatomical relationship is crucial in understanding the anatomy of the anterior segment of the eye, particularly in the context of aqueous humor outflow and the dynamics of intraocular pressure.

The trabecular meshwork is a porous structure located at the anterior chamber angle, playing a significant role in draining aqueous humor from the eye. Understanding its boundaries is essential for diagnosing and managing conditions like glaucoma, where the drainage system might become obstructed. The scleral spur serves as a landmark from which the meshwork extends towards Schwalbe's line, which is the outermost limit of the corneal endothelium.

Recognizing these critical points helps in imaging and ultrasound examinations when assessing the morphological features of the anterior segment. This detailed understanding is fundamental for any professional working in ophthalmic diagnostics and surgeries.