Hypotelorism is an abnormally decreased distance between two organs or bodily parts, usually pertaining to the eye sockets (orbits), also known as orbital hypotelorism. Causes It is often a result of fetal alcohol syndrome (FAS), caused by large alcohol intake in the first month of pregnancy.It can be associated with trisomy 13, which is also known as Patau syndrome, as well as hereditary neuralgic amyotrophy.It can also be associated with fragile X syndrome and Prader–Willi syndrome. [Source: Wikipedia ]