Assertion: position | /r/ObjectUse | used for prism
Facets:
value: commonly
type: TEMPORAL
Source sentences:
text: This position is commonly used for a superior sitting surgeon that uses a combination of downward patient tilt, of approximately 30 to 35 degrees, microscope tilt towards themselves at the same angle and an intraoperative gonio lens or prisms that allows them to visualise the inferior trabecular meshwork.