Has a human cyclops ever lived to adulthood?

It is extremely rare that is does happen in humans; and they are never known to live to be adults.

https://en.wikipedia.org/wiki/Holoprosencephaly

"It is incompatible with life."

"Cyclopes are rare congenital abnormalities; a severe form of holoprosencephaly resulting in children being born with just one eye. It results from failure of the cerebral hemisphere to separate during fetal development. The incidence is 1 in 13,000 live births but present in 1 in 2500 pregnancies that end up as miscarriage. It is incompatible with life."

http://www.geneticdisorders.info/article/706469944/human-deformities-caused-by-bizarre-diseases-or-physical-anomalies/

The complication isn't just the presence of one central eye instead of two eyes in symmetry, but the malformation of the nose and breathing apparatus and of the brain.