Anatom3DTrochlea of superior oblique
Trochlea musculi obliqui superioris · Kladka horního šikmého svalu
Joints & cartilage
Looks like
A small U-shaped loop of fibrocartilage on the upper inner edge of the eye socket, a pulley for an eye muscle tendon.
What it does
Redirects the superior oblique tendon so the muscle can turn the eye down and inward.
Keeping it well
Can be inflamed (trochleitis), giving pain at the upper inner eye socket worse on looking up; an eye doctor can treat it.