What is Schlemm's canal?

What is Schlemm's canal?

• A. A vessel in the eye that collects aqueous humor from the anterior chamber and delivers it into the episcleral blood vessels
• B. A nerve in the retina
• C. A vein in the cornea
• D. A duct draining tears

Answer: (A)

Schlemm's canal is part of the eye’s aqueous humor drainage system. It’s a circular, endothelial-lined canal located at the corneal-scleral junction (the limbus) that collects aqueous humor from the anterior chamber after it passes through the trabecular meshwork. From Schlemm's canal, the fluid drains into collector channels and then into the episcleral veins, helping to regulate intraocular pressure. It is not a nerve in the retina, not a vein in the cornea, and not a tear duct, so the description that it collects aqueous humor from the anterior chamber and delivers it to the episcleral blood vessels is the best fit.

Schlemm's canal is part of the eye’s aqueous humor drainage system. It’s a circular, endothelial-lined canal located at the corneal-scleral junction (the limbus) that collects aqueous humor from the anterior chamber after it passes through the trabecular meshwork. From Schlemm's canal, the fluid drains into collector channels and then into the episcleral veins, helping to regulate intraocular pressure. It is not a nerve in the retina, not a vein in the cornea, and not a tear duct, so the description that it collects aqueous humor from the anterior chamber and delivers it to the episcleral blood vessels is the best fit.