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Related Concept Videos

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...
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...
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...
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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 23, 2026

Establishment of a Severe Dry Eye Model Using Complete Dacryoadenectomy in Rabbits
07:43

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Iatrogenic eyelid granulomata.

David Haider1, Robert Wynn, S Ahmed Sadiq

  • 1Manchester Royal Eye Hospital, Manchester, UK. dhaider@nhs.net

American Journal of Therapeutics
|May 13, 2009
PubMed
Summary

A new antifungal drug, posaconazole, may be linked to eyelid granulomata. Discontinuing the medication reduced symptoms, while restarting it caused them to worsen.

Area of Science:

  • Ophthalmology
  • Dermatology
  • Infectious Diseases

Background:

  • Posaconazole is a novel systemic antifungal agent.
  • Eyelid granulomata are inflammatory lesions affecting the eyelids.

Observation:

  • A pediatric patient presented with bilateral eyelid granulomata.
  • The granulomata showed a temporal relationship with posaconazole use.

Findings:

  • Discontinuation of posaconazole led to a reduction in granuloma size and symptoms.
  • Resumption of posaconazole therapy resulted in an exacerbation of symptoms.

Implications:

  • This case suggests a potential adverse effect of posaconazole.
  • Further investigation is warranted to confirm the association between posaconazole and eyelid granulomata.

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