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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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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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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, 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...

Muscles of the Eye

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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Customizing a Cryolite Glass Prosthetic Eye

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Published on: October 31, 2019

[Restricted eyeball with proptosis].

M Witteborn¹, S Mennel

¹Klinik für Augenheilkunde, Philipps-Universität Marburg, Robert-Koch-Strasse 4, 35037, Marburg, Deutschland. michael.witteborn@med.uni-marburg.de

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Summary

This summary is machine-generated.

Orbital cellulitis, an eye socket infection, can rarely occur years after scleral buckling surgery due to infected implants. Myopia-related scleral thinning may increase risk.

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Area of Science:

Ophthalmology
Infectious Diseases

Background:

Orbital cellulitis presents as acute inflammation of orbital contents, often stemming from ENT infections.
It is a rare complication following scleral buckling procedures.

Observation:

A patient developed orbital cellulitis many years post-scleral buckling.
The infection originated from a previously implanted cerclage.

Findings:

Chronic infection of the scleral cerclage led to orbital cellulitis.
Pre-existing scleral thinning and atrophy, associated with myopia, likely predisposed the patient to this complication.

Implications:

Highlights the potential for late-onset infections from surgical implants.
Suggests that scleral integrity is crucial in preventing orbital infections post-surgery.
Emphasizes the need for vigilance in patients with myopia undergoing scleral buckling.