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Related Experiment Videos

Scanning electron microscope study of the rabbit anterior chamber angle.

Shozo Nishida1, Hideya Uchida, Makoto Takeuchi

  • 1Department of Ophthalmology, Aichi Medical University, Yazako, Nagakute-cho, Japan. nishidas@gk9.so-net.ne.jp

Medical Molecular Morphology
|September 15, 2005
PubMed
Summary
This summary is machine-generated.

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The anterior chamber angle in albino rabbits lacks Schlemm's canal but features an angular aqueous plexus. Its collagenous framework reveals direct connections between trabecular spaces and a potentially weak link to the corneosclera.

Area of Science:

  • Ophthalmology
  • Anatomy
  • Microscopy

Background:

  • The anterior chamber angle's structure is crucial for aqueous humor outflow.
  • Albino rabbits lack a Schlemm's canal, presenting a unique model for studying ocular drainage.
  • Understanding the collagenous framework is key to comprehending intraocular pressure regulation.

Purpose of the Study:

  • To elucidate the three-dimensional fine structure and collagenous framework of the albino rabbit anterior chamber angle.
  • To investigate the anatomical features in the absence of Schlemm's canal.
  • To describe the relationship between the trabecular meshwork and corneosclera.

Main Methods:

  • Scanning electron microscopy (SEM) was employed.
  • NaOH maceration was used to enhance visualization of the collagenous structures.

Related Experiment Videos

  • Detailed examination of the anterior chamber angle's fine structure.

    • Main Results:

    • The chamber angle is ill-defined, with iris pillars partitioning the ciliary cleft.
    • Pectinate ligaments and iris pillars connect to the trabecular sheet's collagen bundles.
    • Round openings in the ciliary cleft suggest direct communication between trabecular spaces.
    • Angular aqueous plexus openings were observed instead of Schlemm's canal.
    • The trabecular sheet comprises circumferentially arranged flat and reticularly diverged narrow collagen bundles.
    • A frail connection between the trabecular meshwork and corneosclera was noted.

    Conclusions:

    • The albino rabbit anterior chamber angle possesses an angular aqueous plexus/sinus in lieu of Schlemm's canal.
    • The collagenous framework facilitates direct intertrabecular space communication.
    • The trabecular meshwork exhibits a potentially weak structural integration with the corneosclera.