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Anatomy of Tenons capsule
Hirohiko Kakizaki1, Yasuhiro Takahashi, Takashi Nakano
1Department of Ophthalmology, Aichi Medical University, Nagakute, Aichi, Japan. cosme@d1.dion.ne.jp
Clinical & Experimental Ophthalmology
|December 17, 2011
Summary
Tenons capsule has distinct anterior and posterior anatomical structures. The anterior portion is thick, fibrous, and contains muscle, while the posterior part is a thinner orbital fat capsule.
Area of Science:
- Ophthalmology
- Anatomy
- Ocular Anatomy
Background:
- Tenons capsule's microscopic and macroscopic anatomy is detailed.
- This study elucidates the structural characteristics of Tenons capsule.
Purpose of the Study:
- To describe the microscopic and macroscopic anatomy of the anterior and posterior Tenons capsule.
- To differentiate the structural components of Tenons capsule.
Main Methods:
- Observational anatomic study of cadaver orbits (microscopic and macroscopic examination).
- Specimens underwent X-shaped incisions for detailed sectioning and analysis.
- Macroscopic evaluation involved studying the appearance of Tenons capsule after globe and eyelid removal.
Main Results:
- Microscopically, anterior Tenons capsule is thick, fibrous, contains smooth muscle, and reaches the globe equator.
- Posterior Tenons capsule envelops orbital fat, lacks muscle, and extends to the optic nerve.
- Macroscopically, the anterior capsule is thick and white, while the posterior capsule is thinner, more translucent, and larger laterally.
Conclusions:
- Tenons capsule comprises an anterior thick fibrous layer with orbital smooth muscle.
- The posterior component is a thin fibrous capsule of orbital fat.
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