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Related Concept Videos

Open Angle Glaucoma: Treatment01:27

Open Angle Glaucoma: Treatment

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...
Glaucoma: Overview01:25

Glaucoma: Overview

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...
Angle Closure Glaucoma: Treatment01:28

Angle Closure Glaucoma: Treatment

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...
Accessory Structures of the Eye01:17

Accessory Structures of the Eye

Optical perception, or vision, is an extraordinary sense dependent on converting light signals received via the ocular organs. These organs, known as eyes, are securely positioned within the bony cavities of the skull, called orbits. The orbits serve a dual purpose: a protective shield for the ocular globes and a stable attachment point for the soft ocular tissues. The eye's external protective mechanisms include the eyelids, which are edged with lashes that act as a barrier against foreign...
Ophthalmic Drug Delivery Systems01:23

Ophthalmic Drug Delivery Systems

Ophthalmic drug delivery faces major limitations due to poor absorption across the corneal membrane. This process is primarily driven by diffusion and is influenced by two main factors: the physicochemical properties of the drug and tear drainage. Most ophthalmic drugs, such as pilocarpine, epinephrine, atropine, and local anesthetics, are weak bases. They are typically formulated at an acidic pH to enhance chemical stability. However, this leads to high ionization, reducing their ability to...
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Microbiome of the Eye

The human eye has a specialized microbiota that reflects its unique anatomical and immunological environment. This low-biomass microbial community predominantly colonizes the conjunctiva and eyelid margins, playing a vital role in ocular surface homeostasis and defense. Despite its proximity to the richly colonized facial skin, the ocular surface maintains a distinct microbial profile due to continuous mechanical and biochemical defense mechanisms.The conjunctival surface hosts fewer microbial...

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Related Experiment Video

Updated: Jun 27, 2026

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

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Published on: March 12, 2016

Patients with essential blepharospasm and glaucoma: case reports.

André Gustavo Bombana Nicoletti1, Leandro Cabral Zacharias, Remo Susanna

  • 1Departamento de Plástica Ocular, Hospital das Clínicas, Faculdade de Medicina, Universidade de São Paulo, São Paulo, Brasil. agbnicoletti@yahoo.com.br

Arquivos Brasileiros De Oftalmologia
|November 29, 2008
PubMed
Summary

Essential blepharospasm patients may have an increased risk of developing glaucoma. This study suggests that individuals with blepharospasm should undergo thorough glaucoma evaluations.

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Last Updated: Jun 27, 2026

Glaucoma-inducing Procedure in an In Vivo Rat Model and Whole-mount Retina Preparation
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Published on: February 15, 2022

Area of Science:

  • Ophthalmology
  • Neurology

Background:

  • Essential blepharospasm involves involuntary eyelid muscle contractions, significantly impacting quality of life.
  • Severe blepharospasm can lead to functional blindness and social isolation.
  • Oculoplastic surgeons manage blepharospasm patients, often focusing solely on spasm resolution.

Observation:

  • Four patients with essential blepharospasm were diagnosed with glaucoma.
  • These patients exhibited glaucomatous optic neuropathy and visual field defects without other apparent causes.
  • Repetitive eyelid squeezing in blepharospasm may elevate intraocular pressure.

Findings:

  • A potential link exists between essential blepharospasm and glaucoma development.
  • Elevated intraocular pressure from forceful eyelid closure could be a risk factor.
  • Glaucoma may be an underdiagnosed comorbidity in blepharospasm patients.

Implications:

  • Ophthalmological examinations for blepharospasm patients should include comprehensive glaucoma screening.
  • Early detection and management of glaucoma are crucial for preserving vision in these patients.
  • Further research is warranted to elucidate the relationship between blepharospasm and glaucoma.