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Related Concept Videos

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...
Muscles of the Eye01:20

Muscles of the Eye

The muscles of the eye are sophisticated structures that control eye movement and focus, allowing for the precise and rapid adjustments necessary for vision. The human eye is controlled by ten muscles — six extraocular muscles, three intraocular muscles, and one primary eyelid retractor muscle.
Extraocular Muscles
The six extraocular muscles surround the eyeball and control its movements. They are responsible for a wide range of eye motions, including looking up, down, left, right, and rotating...
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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...
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...
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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...

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Related Experiment Video

Updated: Jun 5, 2026

Characterizing the Relationship Between Eye Movement Parameters and Cognitive Functions in Non-demented Parkinson's Disease Patients with Eye Tracking
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[Essential blepharospasm: literature review].

André Gustavo Bombana Nicoletti1, Lísia Aoki, Tatiana Rizkallah Nahas

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

Arquivos Brasileiros De Oftalmologia
|January 13, 2011
PubMed
Summary

Essential blepharospasm is a rare focal dystonia causing involuntary eyelid contractions. Early diagnosis and treatment are crucial to prevent vision loss.

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Induction of Ocular Surface Inflammation and Collection of Involved Tissues
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Characterizing the Relationship Between Eye Movement Parameters and Cognitive Functions in Non-demented Parkinson's Disease Patients with Eye Tracking
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Characterizing the Relationship Between Eye Movement Parameters and Cognitive Functions in Non-demented Parkinson's Disease Patients with Eye Tracking

Published on: September 26, 2019

Induction of Ocular Surface Inflammation and Collection of Involved Tissues
06:38

Induction of Ocular Surface Inflammation and Collection of Involved Tissues

Published on: August 4, 2022

Area of Science:

  • Neurology
  • Ophthalmology

Context:

  • Essential blepharospasm is a focal dystonia affecting eyelid muscles.
  • It is characterized by involuntary, spasmodic, bilateral contractions of eyelid protractors.
  • This rare condition often experiences delayed diagnosis and can lead to functional blindness.

Purpose:

  • To provide a comprehensive review of essential blepharospasm.
  • To detail the disease's historical aspects, epidemiology, etiology, clinical findings, differential diagnosis, and treatment options.

Summary:

  • Essential blepharospasm involves involuntary, spasmodic contractions of eyelid muscles.
  • The condition's rarity contributes to delayed diagnosis and potential progression to vision impairment.
  • This review covers key features from history to treatment.

Impact:

  • Enhances understanding of essential blepharospasm for clinicians and researchers.
  • Highlights the importance of timely diagnosis and intervention.
  • Provides a consolidated resource for managing this rare neurological disorder.