The normal eyelid can be detected opening and closing sonographically.
A fetus with persistently fixed open eyelids may be detected sonographically.
This may be found in Neu-Laxova syndrome (1).
REFERENCES
Shapiro I, Borochowitz Z, Degni S et.al. Neu-Laxova syndrome:
Prenatal sonographic diagnosis, clinical and pathological studies and new
manifestations. Am J Med Genet 1992;43:602-605.