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Related Concept Videos

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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At the molecular level, visual signals trigger transformations in photopigment molecules, resulting in changes in the photoreceptor cell's membrane potential. The photon's energy level is denoted by its wavelength, with each specific wavelength of visible light associated with a distinct color. The spectral range of visible light, classified as electromagnetic radiation, spans from 380 to 720 nm. Electromagnetic radiation wavelengths exceeding 720 nm fall under the infrared category,...
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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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A single mitochondrion is a bean-shaped organelle enclosed by a double-membrane system. The outer membrane of mitochondria is smooth and contains many porins - the integral membrane transporters. Porins enable free diffusion of ions and small uncharged molecules through the outer mitochondrial membrane but limit the transport of molecules larger than 5000 Daltons. Further, the outer mitochondrial membrane forms a unique structure called membrane contact sites with other subcellular organelles,...
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Determination of Mitochondrial Respiration and Glycolysis in Ex Vivo Retinal Tissue Samples
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Mitochondrial dysfunction in ocular disease: Focus on glaucoma.

Khalid Kamel1, Michael Farrell2, Colm O'Brien1

  • 1Institute of Ophthalmology, Mater Misericordiae University Hospital, Dublin, Ireland.

Mitochondrion
|May 14, 2017
PubMed
Summary
This summary is machine-generated.

Mitochondrial dysfunction often causes eye problems, making eye exams crucial for early detection. Research is advancing diagnostics and treatments for these vision-impairing mitochondrial eye diseases, including gene therapy for glaucoma.

Keywords:
GlaucomaMitochondriaOxidative stressmtDNA

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Area of Science:

  • Ophthalmology
  • Genetics
  • Cell Biology

Background:

  • Mitochondrial dysfunction is a systemic issue frequently presenting with ocular manifestations.
  • Ophthalmic findings can be the earliest indicators of mitochondrial disorders.
  • Many genetic and acquired eye diseases with poor prognoses involve impaired mitochondrial function.

Purpose of the Study:

  • To review common mitochondrial-related eye diseases.
  • To discuss current diagnostic approaches and emerging treatments.
  • To highlight the role of mitochondrial dysfunction in glaucoma.

Main Methods:

  • Literature review of mitochondrial eye diseases.
  • Analysis of diagnostic strategies.
  • Evaluation of therapeutic interventions, including gene therapy.

Main Results:

  • Ocular symptoms are key indicators of mitochondrial dysfunction.
  • Advances in mitochondrial research are clarifying previously unknown ocular disorders.
  • Gene therapy shows promise for treating certain mitochondrial eye conditions.

Conclusions:

  • Comprehensive ophthalmic assessments are vital for diagnosing mitochondrial disorders.
  • Further research into mitochondrial dysfunction and treatments can improve patient outcomes.
  • Targeted therapies, including gene therapy, offer new hope for managing mitochondrial eye diseases like glaucoma.