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Related Concept Videos

Glaucoma: Overview01:25

Glaucoma: Overview

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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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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.
Drugs such as carbonic anhydrase inhibitors, α2- and...
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Angle Closure Glaucoma: Treatment01:28

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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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Photoreceptors and Visual Pathways01:22

Photoreceptors and Visual Pathways

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At the molecular level, visual signals trigger transformations in photopigment molecules, resulting in changes in the photoreceptor cell's membrane potential. The photon's energy level is denoted by its wavelength, with each specific wavelength of visible light associated with a distinct color. The spectral range of visible light, classified as electromagnetic radiation, spans from 380 to 720 nm. Electromagnetic radiation wavelengths exceeding 720 nm fall under the infrared category,...
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Focusing of Light in the Eye01:16

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Light rays enter the eye through the cornea, a transparent dome-shaped tissue that is the eye's outermost layer. The cornea bends or refracts, light rays traveling to the pupil. The shape of the cornea determines how much of the light is bent and whether the image will be focused correctly on the retina at the back of the eye. Once the light has passed through both refraction layers, it converges into a single focal point onto a small area. This is where photoreceptors start transforming...
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Pharmacokinetics in Geriatric Patients: Effect of Age on Drug Absorption

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As individuals age, their body's physiology evolves, affecting drug pharmacokinetics. The most apparent changes occur in the gastrointestinal tract, where an increase in gastric pH, a delay in gastric emptying, and a reduction in gastrointestinal motility are observed. Remarkably, these changes do not substantially modify the absorption of orally administered drugs, particularly those absorbed via passive diffusion.Transdermal drug delivery emerges as a highly viable method for older adults due...
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Related Experiment Video

Updated: Mar 29, 2026

Glaucoma-inducing Procedure in an In Vivo Rat Model and Whole-mount Retina Preparation
08:30

Glaucoma-inducing Procedure in an In Vivo Rat Model and Whole-mount Retina Preparation

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A view on glaucoma--are we seeing it clearly?

D P Crabb1

  • 1Optometry and Visual Science, School of Health Sciences, City University London, London, UK.

Eye (London, England)
|November 28, 2015
PubMed
Summary

Glaucoma management requires understanding how visual field defects impact daily tasks, not just intraocular pressure. Patient perspectives are crucial for effective treatment decisions and preventing visual disability.

Area of Science:

  • Ophthalmology
  • Visual Neuroscience
  • Patient-Reported Outcomes

Background:

  • Effective glaucoma management extends beyond intraocular pressure control to preventing visual disability.
  • Understanding the specific visual field defects that impair daily activities in glaucoma patients is limited.
  • Current research explores both laboratory-based performance measures and patient self-reports to assess functional vision.

Discussion:

  • Patient-reported outcomes offer valuable insights into the lived experience of visual impairment in glaucoma.
  • Integrating patient perspectives can demystify the impact of visual field loss on everyday life.
  • This commentary reviews current research on how glaucoma affects daily visual task performance.

Key Insights:

  • Visual disability in glaucoma is a critical factor in treatment intensification decisions.

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Related Experiment Videos

Last Updated: Mar 29, 2026

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  • Definitive links between specific visual field defects and everyday task difficulties require further investigation.
  • Patient-reported data provides a unique lens for understanding functional vision loss.

    • Outlook:

    • Future research should prioritize patient-centered approaches to fully grasp the functional consequences of glaucoma.
    • Developing better tools to correlate visual field data with patient-reported difficulties is essential.
    • This understanding will refine clinical strategies for preserving quality of life in glaucoma patients.