Win an All-Access Pass!
Become a new yearly Curie (Radium) or Roentgen (Gold) Radiopaedia Supporter during December and be in the running to win one of four 12-month All-Access Passes. Find out more.


Hypertelorism refers to an abnormal increase in distance between any two organs although some authors use the term synonymously with orbital hypertelorism meaning an abnormal increase in distance between the two eyes. The article mainly focuses on the latter. The abnormality is similar to telecanthus which means an increased distance between the medial canthi of the eyelids.

Over development of the lesser wings of the sphenoid bone may be an undelying factor.

While it can as an isolated anomaly, there are numerous syndromic as well as non syndromic associations with orbital hypertelorism which include:

There are many more associations other than those mentioned on this list. Please add and/or reference as appropriate.

It is can be assesssed by measuring the distance between the lateral orbital walls or the medial orbital walls. The interocular distance/diameter (IOD) and the biocular diameter (BOD) are both typically increased with hypertelorism.

Due to its associations with other conditions, a detailed sonographic surveillence for other fetal anomalies are recommended if hypertelorism is seen on ultrasound.

Some indices used include:

Article information

rID: 13208
Tag: cases
Synonyms or Alternate Spellings:
  • Orbital hypertelorism
  • Ocular hypertelorism
  • Euryopia

ADVERTISEMENT: Supporters see fewer/no ads

Updating… Please wait.

 Unable to process the form. Check for errors and try again.

 Thank you for updating your details.