The contiguous surfaces of the tendon and ring are lined by a delicate mucous sheath, and enclosed in a thin fibrous investment.

The superior and inferior oblique muscles make an angle of 51 degrees with the optical axis.

The two obliques prevent the eye from rotating about its long axis (retina to pupil) when the superior and inferior rectus muscles contract.

Restriction of superior oblique relaxation movement due to an inelastic tendon is found in Brown syndrome, leading to difficulty elevating the eye in the adducted position.

[3] Superior oblique myokymia is an uncommon neurological condition caused by vascular compression of the trochlear nerve resulting in repeated, brief, involuntary episodes of movement of the eye.

This article incorporates text in the public domain from page 1022 of the 20th edition of Gray's Anatomy (1918)