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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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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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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.
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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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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.
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Updated: Oct 12, 2025

Full-Circle Cauterization of Limbal Vascular Plexus for Surgically Induced Glaucoma in Rodents
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Changes in eyelid position after glaucoma filtering surgery.

Teresa Salvá-Palomeque1, Pablo Muñoz-Ramón1, Gema Rebolleda1

  • 1Ophthalmology Department, IRYCIS, 16507Ramon y Cajal University Hospital, Madrid, Spain.

European Journal of Ophthalmology
|November 23, 2021
PubMed
Summary
This summary is machine-generated.

Glaucoma surgery can cause eyelid changes. This study found 11% developed ptosis and 8% eyelid retraction, with pseudoexfoliation a potential risk factor for ptosis.

Keywords:
Eyelidsglaucoma

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Area of Science:

  • Ophthalmology
  • Surgical Complications
  • Glaucoma Management

Background:

  • Ptosis is a known complication of glaucoma surgery.
  • Isolated reports suggest eyelid retraction may also occur post-surgery.
  • This study investigates the incidence and contributing factors of both ptosis and eyelid retraction after glaucoma surgery.

Purpose of the Study:

  • To analyze the occurrence of ptosis and eyelid retraction following glaucoma surgery.
  • To identify factors associated with these palpebral fissure alterations.
  • To compare eyelid height changes between operated and non-operated eyes.

Main Methods:

  • A cross-sectional study involving 100 patients undergoing unilateral glaucoma surgery.
  • Digital photography was used to measure upper eyelid height, comparing operated and fellow eyes.
  • A difference of ≥1 mm was considered clinically significant for ptosis or retraction.

Main Results:

  • 81% of eyes showed no significant eyelid height change.
  • 11% of operated eyes developed ptosis, and 8% developed eyelid retraction.
  • Ptosis was significantly associated with pseudoexfoliation glaucoma (p=0.003); retraction trended with lower IOP and larger blebs.

Conclusions:

  • Eyelid retraction occurred in 8% and ptosis in 11% of patients post-glaucoma surgery.
  • Lower postoperative IOP was observed in eyes with eyelid retraction.
  • Pseudoexfoliation may be a risk factor for ptosis; further prospective studies are needed.