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FETAL ORBITS |
OUTER ORBITAL DISTANCE (binocular distance) |
Outer orbital distance (Table) / Graphs
- From outer to outer bony margin.
- Found to be more representative of facial dysmorphology
INNER ORBITAL DISTANCE (interocular, interorbital distance) |
- From inner to inner bony margin.
- Inter canthal distance - no longer used as soft tissue and facial abnormalities affect this measurement without affecting the interorbital distance.
Inner Orbital Distance
(Table) / (Graph)
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REFERENCES |
- Trout T, Budorick NE, Pretorius DH, McGahan JP. Significance of Orbital Measurements in the Fetus. J Ultrasound Med 1994, 13: 937-943.
- van Zalen-Sprock R, van Vugt JMG,
van der Harten HJ et.al. First Trimester Diagnosis of Cyclopia and
Holoprosencephaly. J Ultrasound Med 1995, 14:631-633.