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Open Angle Glaucoma: Treatment01:27

Open Angle Glaucoma: Treatment

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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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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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Updated: Jan 25, 2026

Assessing Early Stage Open-Angle Glaucoma in Patients by Isolated-Check Visual Evoked Potential
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Optimum time for angle visualization during ab interno glaucoma surgery: Before or after phacoemulsification.

Rebecca S Epstein1, Anthony T Scott1, Cara E Capitena Young1

  • 1Department of Ophthalmology, University of Colorado School of Medicine, Aurora, USA.

Journal of Cataract and Refractive Surgery
|April 30, 2019
PubMed
Summary

Performing angle surgery before or after phacoemulsification (cataract surgery) shows no significant difference in angle visualization. Surgeon preference should guide the surgical order for combined glaucoma and cataract procedures.

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Area of Science:

  • Ophthalmology
  • Glaucoma Surgery
  • Cataract Surgery

Background:

  • Glaucoma and cataracts often coexist, requiring combined surgical approaches.
  • The optimal sequence for performing angle surgery and phacoemulsification remains debated.
  • Effective visualization of the anterior angle is crucial for successful glaucoma surgery.

Purpose of the Study:

  • To compare the visualization of the anterior angle during combined glaucoma and cataract surgery.
  • To determine if performing angle surgery before or after phacoemulsification offers an advantage.

Main Methods:

  • A retrospective case series design was employed.
  • Video recordings of combined surgeries were analyzed to obtain pre- and post-phacoemulsification angle images.
  • Glaucoma specialists masked to the surgical order rated angle visualization using a 5-point scale.

Main Results:

  • The mean surgeon rating indicated no significant difference in angle visualization between pre- and post-phacoemulsification images (2.93 on a 5-point scale).
  • The most frequent responses were 'no difference' (32.5%) or 'somewhat better' post-phacoemulsification (30%).
  • No patient or ocular characteristics predicted surgeon preference for surgical order.

Conclusions:

  • There is no significant difference in angle visualization when performing ab interno glaucoma surgery before or after phacoemulsification.
  • The choice of surgical order in combined procedures should be based on surgeon preference.
  • This finding simplifies surgical planning for combined glaucoma and cataract procedures.