Schlemm's canal

Sinus venosus sclerae

Sensory (eye & ear)OrgansHeadLeft and right

View left in 3D View right in 3D

What it is
A circular channel running around the eye in the limbal sclera, just outside the trabecular meshwork of the drainage angle.
Function
Collects aqueous humour filtered through the trabecular meshwork and passes it to the episcleral veins.
Size
Ring ~12 mm across; channel ~0.2-0.3 mm wide.
Clinical note
Resistance to outflow here raises eye pressure in open-angle glaucoma; minimally invasive glaucoma stents are placed into the canal.