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Glaucoma: Overview01:25

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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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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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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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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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Axial elongation in nonpathologic high myopia: Ocular structural changes and glaucoma diagnostic challenges.

Kangjie Kong1, Xiaoyi Liu1, Zige Fang1

  • 1State Key Laboratory of Ophthalmology, Zhongshan Ophthalmic Center, Sun Yat-sen University, Guangdong Provincial Key Laboratory of Ophthalmology and Visual Science, Guangdong Provincial Clinical Research Center for Ocular Diseases, Guangzhou, China.

Asia-Pacific Journal of Ophthalmology (Philadelphia, Pa.)
|December 14, 2024
PubMed
Summary

High myopia progression causes eye structure changes that can hinder glaucoma diagnosis. This review examines axial elongation patterns and their impact on detecting glaucoma in adults.

Keywords:
Axial elongationGlaucomaHigh myopiaNonpathologic high myopia

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Area of Science:

  • Ophthalmology
  • Optometry
  • Medical Imaging

Background:

  • High myopia is characterized by continued axial elongation in adulthood, independent of pathological changes.
  • This elongation induces structural alterations in the macula and peripapillary regions, affecting ocular tissues and vasculature.

Purpose of the Study:

  • To review axial elongation progression patterns across diverse populations.
  • To discuss how axial elongation-related structural changes impact glaucoma diagnosis in non-pathologic high myopia.
  • To explore methods for improving glaucoma diagnostic accuracy in this population.

Main Methods:

  • Comparative analysis of axial elongation progression data from various demographic, genetic, environmental, and ocular characteristic groups.
  • Review of literature on structural changes induced by axial elongation.
  • Discussion of diagnostic imaging modalities and their limitations in high myopia.

Main Results:

  • Axial elongation patterns vary significantly based on population characteristics.
  • Structural changes like chorioretinal thinning and optic disc abnormalities complicate imaging interpretation.
  • Current diagnostic tools may yield artifacts, reducing glaucoma detection accuracy in highly myopic eyes.

Conclusions:

  • Ongoing axial elongation in non-pathologic high myopia presents significant challenges for accurate glaucoma diagnosis.
  • Understanding population-specific progression patterns is crucial.
  • Further research is needed to refine diagnostic strategies and enhance efficacy in highly myopic individuals.