What venous ring returns aqueous humor to circulatory system in the eye?

The venous ring that returns aqueous humor to the circulatory system in the eye is known as the Schlemm's canal, or the canal of Schlemm. It encircles the cornea and is responsible for draining aqueous humor from the anterior chamber of the eye into the episcleral veins, ultimately leading to the systemic circulation. Proper functioning of this canal is essential for maintaining intraocular pressure and overall eye health.