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Related Concept Videos

Glaucoma: Overview01:25

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Glaucoma is an eye condition characterized by increased intraocular pressure that damages the retina and optic nerve, leading to irreversible blindness if left untreated. The human eye has various components, including the cornea, iris, pupil, lens, and optic nerve. Aqueous humor is secreted by the epithelium of the ciliary body in the posterior chamber and flows through the trabecular meshwork and canal of Schlemm, maintaining normal intraocular pressure. The trabecular meshwork and the canal...
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In open-angle glaucoma, the iridocorneal angle remains open, but the trabecular meshwork becomes stiff, slowing down the outflow of aqueous humor. This causes a buildup of aqueous humor in the anterior chamber, leading to a sudden increase in intraocular pressure. The treatment for open-angle glaucoma focuses on reducing the elevated intraocular pressure by either decreasing the secretion of aqueous humor or increasing its outflow.
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Angle-closure glaucoma, or closed-angle glaucoma, is an eye condition where the iris bulges out and blocks the iridocorneal angle, resulting in a buildup of aqueous humor and increased intraocular pressure. Immediate medical attention is necessary due to the sudden onset of symptoms. The treatment for angle-closure glaucoma includes short-term and long-term approaches. Short-term treatment involves using eye drops like pilocarpine to lower intraocular pressure by increasing aqueous humor...
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Related Experiment Video

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Ab-interno trabeculotomy-related glaucoma surgeries.

Masaki Tanito1, Masato Matsuo1

  • 1Department of Ophthalmology, Faculty of Medicine, Shimane University, Shimane Prefecture, Japan.

Taiwan Journal of Ophthalmology
|June 15, 2019
PubMed
Summary

Trabeculotomy lowers intraocular pressure by clearing the trabecular meshwork. This glaucoma surgery approach, particularly minimally invasive options, offers a lower risk of serious complications compared to trabeculectomy.

Keywords:
Ab-externo trabeculotomyKahook Dual BladeTrabectomemicrohook ab-interno trabeculotomyminimally invasive glaucoma surgerysuture ab-interno trabeculotomy

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Area of Science:

  • Ophthalmology
  • Glaucoma Surgery
  • Surgical Innovation

Background:

  • Trabeculotomy reduces intraocular pressure by clearing resistance in the trabecular meshwork and Schlemm's canal.
  • Unlike trabeculectomy, trabeculotomy does not typically cause bleb formation, reducing risks of hypotony maculopathy and endophthalmitis.

Purpose of the Study:

  • To review the efficacy and safety of trabeculotomy, focusing on newer minimally invasive techniques.
  • To highlight the advantages of the ab-interno approach in modern glaucoma surgery.

Main Methods:

  • Review of existing literature on trabeculotomy procedures.
  • Comparison of ab-interno and ab-externo trabeculotomy approaches.
  • Analysis of complication rates associated with trabeculotomy versus trabeculectomy.

Main Results:

  • Trabeculotomy effectively reduces intraocular pressure by addressing aqueous humor outflow resistance.
  • Minimally invasive ab-interno trabeculotomy techniques show reduced incidence of sight-threatening complications.
  • Newer procedures like Trabectome and Kahook Dual Blade offer alternatives to conventional methods.

Conclusions:

  • Trabeculotomy is a viable option for managing various types of glaucoma.
  • Minimally invasive ab-interno trabeculotomy presents a favorable safety profile for patients.
  • These novel surgical options are suitable for early-stage open-angle, developmental, and elderly glaucoma patients.