Assertion: retina | /r/AtLocation | optic nerve
Facets:
Source sentences:
text: In RRD without PVR, the retina attached to the optic nerve usually has a rounded pattern with good mobility as it approaches the disc on ultrasound; with PVR, the leaves of the retina may assume a “V” pattern at the optic disc with the retina straightened with limited mobility as they approach the optic nerve (open funnel retinal detachment).