Interocular distance
Last revised by Alexandra Stanislavsky on 27 Jul 2022
Citation, DOI, disclosures and article data
Citation:
Radswiki T, Stanislavsky A, Shah V, et al. Interocular distance. Reference article, Radiopaedia.org (Accessed on 28 Mar 2024) https://doi.org/10.53347/rID-15280
Permalink:
rID:
15280
Article created:
7 Oct 2011,
The Radswiki ◉
Disclosures:
At the time the article was created The Radswiki had no recorded disclosures.
View The Radswiki's current disclosures
Last revised:
27 Jul 2022,
Alexandra Stanislavsky ◉
Disclosures:
At the time the article was last revised Alexandra Stanislavsky had no recorded disclosures.
View Alexandra Stanislavsky's current disclosures
Revisions:
4 times, by
4 contributors -
see full revision history and disclosures
Systems:
Synonyms:
- Inter-ocular distance (IOD)
- Inter ocular distance
- Interocular distance / diameter (IOD)
- Interocular distance
- Interocular diameter
- Inter-ocular diameter
- Interorbital distance
The interocular distance (IOD) is a measurement between the two medial canthi of each eye. It is often measured as an accessory biometric parameter on routine antenatal ultrasound scans on the axial images. As a rule of thumb, the interorbital distance should be roughly equal to the ocular diameter - however specific biometric charts are available.
Increased interocular distance is referred to as hypertelorism and decreased distance as hypotelorism.
See also
References
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- 2. Rosati P, Guariglia L. Early transvaginal fetal orbital measurements: a screening tool for aneuploidy? J Ultrasound Med. 2003;22 (11): 1201-5. J Ultrasound Med (full text) - Pubmed citation
- 3. Sukonpan K, Phupong V. Fetal ocular distance in normal pregnancies. J Med Assoc Thai. 2008;91 (9): 1318-22. - Pubmed citation
- 4. Gottlieb AG, Galan HL. Nontraditional sonographic pearls in estimating gestational age. Semin. Perinatol. 2008;32 (3): 154-60. doi:10.1053/j.semperi.2008.02.003 - Pubmed citation
- 5. Bluth EI, Benson CB, Ralls PW et-al. Ultrasound, a practical approach to clinical problems. George Thieme Verlag. (2007) ISBN:1588904059. Read it at Google Books - Find it at Amazon