Page 4 - SONO 260 Chapter 25 The Fetal Face and Neck

Fetal Orbital Abnormalities
▪ There are three measurements that can be obtained in the transverse plane of the fetal face at the level of the eyes.
– The ocular diameter is a measurement that is performed from the lateral wall of the orbit to the medial wall of the same orbit.
▪ Thismeasurementshouldonlybeslightlysmallerthantheinteroculardiameter,whichis the length between the orbits.
– The binocular diameter can also be obtained at the same level and includes both of the orbits.
– The binocular diameter is made from the lateral margin of one orbit to the lateral margin of the other orbit.