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Related Concept Videos

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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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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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

Updated: Jun 26, 2025

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MP-3 microperimeter in early primary open angle glaucoma with a new pattern.

Shuang Liang1, Li-Tao Wang2, Xiao-Li Liu1

  • 1Department of Ophthalmology of the Second Hospital of Hebei Medical University, Shijiazhuang 050000, Hebei Province, China.

International Journal of Ophthalmology
|May 20, 2024
PubMed
Summary

New microperimetry techniques detect early primary open angle glaucoma (POAG) changes in macular sensitivity sooner than standard tests. This method shows significant associations between visual function and ganglion cell complex thickness in glaucoma patients.

Keywords:
early primary open angle glaucomaganglion cell complexmacular sensitivitymicroperimetryoptical coherence tomography

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Area of Science:

  • Ophthalmology
  • Glaucoma Research
  • Visual Neuroscience

Background:

  • Primary open angle glaucoma (POAG) is a leading cause of irreversible blindness.
  • Early detection of glaucomatous damage is crucial for preserving vision.
  • Conventional perimetry may not detect subtle visual field defects in early glaucoma stages.

Purpose of the Study:

  • To evaluate macular sensitivity in early POAG using a novel custom-made microperimetry pattern.
  • To analyze the relationship between macular sensitivity and ganglion cell complex (GCC) thickness.
  • To compare the efficacy of the new microperimetry pattern with standard visual field tests.

Main Methods:

  • A case-control study involving 38 patients with POAG (pre-perimetric and early-stage) and 20 controls.
  • Macular sensitivity assessed using MP-3 microperimeter with a custom 28-point pattern (central 10°).
  • Ganglion cell complex (GCC) thickness measured via OCT; structure-function analysis performed per quadrant.

Main Results:

  • Pre-perimetric glaucoma patients showed reduced inferior hemifield macular sensitivity.
  • Early-stage POAG patients exhibited significantly lower mean sensitivity in multiple sectors compared to controls and pre-perimetric groups.
  • Significant correlations found between macular sensitivity and GCC thickness across all sectors, strongest in the inferotemporal quadrant.

Conclusions:

  • Microperimetry with a custom pattern detects macular sensitivity deficits in early POAG, including pre-perimetric stages, earlier than conventional perimetry.
  • The new pattern may enhance microperimetry accuracy and patient comfort.
  • Strong structure-function associations between macular sensitivity and GCC thickness confirm the clinical utility of this approach.