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Related Concept Videos

Open Angle Glaucoma: Treatment01:27

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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: 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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Related Experiment Video

Updated: Dec 17, 2025

Assessing Early Stage Open-Angle Glaucoma in Patients by Isolated-Check Visual Evoked Potential
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Octopus 900 Automated Kinetic Perimetry versus Standard Automated Static Perimetry in Glaucoma Practice.

Fiona J Rowe1, Gabriela Czanner2, Tobi Somerville3

  • 1Department of Health Services Research, University of Liverpool , Liverpool, UK.

Current Eye Research
|June 23, 2020
PubMed
Summary

Automated kinetic perimetry offers valuable peripheral visual field insights in advanced glaucoma, complementing central static perimetry. This method provides clinically useful information beyond the central 30-degree field, especially when central fields are severely impaired.

Keywords:
Standard automated perimetryadvanced stageautomated kinetic perimetryglaucomaoctopus 900

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Area of Science:

  • Ophthalmology
  • Visual Science

Background:

  • Central visual field loss in glaucoma does not always predict the extent of peripheral visual field loss.
  • Advanced glaucoma requires comprehensive visual field assessment to understand disease progression and impact.

Purpose of the Study:

  • To evaluate if automated kinetic perimetry provides additional visual field information compared to central static perimetry in advanced glaucoma.
  • To assess the utility of kinetic perimetry in cases where central static perimetry is non-informative due to severe visual field defects.

Main Methods:

  • A prospective cross-sectional study involving 126 patients (170 eyes) with advanced glaucoma (stages 3-4).
  • Visual field assessment using the Octopus 900 G program with a kinetic strategy for both eyes within a single clinic visit.
  • Analysis of kinetic perimetry parameters (I4e, I2e) and correlation with static perimetry measures (sensitivity, mean deviation, standard loss variance).

Main Results:

  • Automated kinetic perimetry (I4e) was plotted in 71% of eyes, revealing significant peripheral visual field areas and radii.
  • Increased kinetic reaction time correlated with poorer visual field outcomes (p = .001).
  • While a correlation existed between static and kinetic fields, poor static fields did not always infer poor kinetic fields, indicating kinetic perimetry adds distinct information.

Conclusions:

  • Automated kinetic perimetry provides clinically useful peripheral visual field information beyond the central 30-degree static field.
  • There is a lack of agreement and only a small-to-medium correlation between central static and peripheral kinetic visual field extents.
  • Kinetic perimetry is valuable in advanced glaucoma, particularly when central visual fields are severely compromised and provide limited information.