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Location of the inferior oblique muscle origin with reference to the lacrimal caruncle and its significance in oculofacial surgery
- Source :
- British Journal of Ophthalmology. 100:179-183
- Publication Year :
- 2015
- Publisher :
- BMJ, 2015.
-
Abstract
- Purpose To identify the location of the inferior oblique muscle (IOM) origin with reference to the lacrimal caruncle in order to facilitate safer oculofacial surgery by preventing morbidity associated with IOM injury. Methods Thirty-seven intact orbits of 20 embalmed Asian cadavers were dissected. The location of the medial border of the IOM origin was determined with respect to the apex of the lacrimal caruncle. In addition, the size of the IOM origin and the anteroposterior distance from the inferior orbital rim to the anterior border of the IOM origin were measured. Results The IOM origin was located at a mean distance of 1.2 mm lateral and 11.2 mm inferior to the apex of the lacrimal caruncle. In half of the orbits, the IOM origin was situated just on the vertical line through the apex of the lacrimal caruncle. The mean length and width of the IOM origin were 4.3 and 2.7 mm, respectively. The mean anteroposterior distance from the inferior orbital rim to the IOM origin was 1.9 mm. Conclusions The lacrimal caruncle is easily identifiable and a reliable external landmark for prediction of the IOM origin. The IOM origin is located approximately where the vertical line through the apex of the lacrimal caruncle intersects the inferior orbital rim. The findings of this anatomical study of the exact location of the IOM origin can help to improve the safety of oculofacial surgery.
- Subjects :
- Adult
Male
medicine.medical_specialty
education
Ophthalmologic Surgical Procedures
03 medical and health sciences
Cellular and Molecular Neuroscience
0302 clinical medicine
Inferior oblique muscle
Asian People
Cadaver
medicine
Humans
Exact location
health care economics and organizations
Aged
Aged, 80 and over
business.industry
Dissection
digestive, oral, and skin physiology
Lacrimal Apparatus
Anatomy
Middle Aged
Sensory Systems
Apex (geometry)
Lacrimal caruncle
Surgery
Ophthalmology
medicine.anatomical_structure
Oculomotor Muscles
Face
030220 oncology & carcinogenesis
030221 ophthalmology & optometry
Female
business
Orbit
Orbit (anatomy)
Subjects
Details
- ISSN :
- 14682079 and 00071161
- Volume :
- 100
- Database :
- OpenAIRE
- Journal :
- British Journal of Ophthalmology
- Accession number :
- edsair.doi.dedup.....79668768f9734bb090f86f5f4aea52a5