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Related Concept Videos

Open Angle Glaucoma: Treatment01:27

Open Angle Glaucoma: Treatment

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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: 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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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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Related Experiment Video

Updated: Sep 14, 2025

Multimodal Volumetric Retinal Imaging by Oblique Scanning Laser Ophthalmoscopy oSLO and Optical Coherence Tomography OCT
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Retinal Vascular Diseases Highlighted by Adaptive Optics Ophthalmoscopy.

Andrada-Elena Mirescu1, Dan George Deleanu2,3, George Baltă2

  • 1"Ovidius" University of Constanţa, Constanţa, Romania.

Romanian Journal of Ophthalmology
|July 23, 2025
PubMed
Summary

Adaptive optics ophthalmoscopy reveals retinal microcirculation and photoreceptor changes in vascular retinal diseases like diabetic retinopathy and MacTel type 2. This technology aids in disease monitoring and understanding progression.

Keywords:
AO = adaptive opticsBCVA = best corrected visual acuityDR = diabetic retinopathyFC = fundus camerasLD = lumen diameterMacTel = macular telangiectasiaOCT = optical coherence tomographyROI = regions of interestSHWS = Shack-Hartmann wavefront sensorSLO = scanning laser ophthalmoscopyTD = total vessel diameterWCSA = wall cross-sectional areaWLR = wall-to-lumen ratioWT = wall thicknessadaptive opticsretinal vascular diseases

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Area of Science:

  • Ophthalmology
  • Medical Imaging
  • Retinal Diseases

Background:

  • Vascular retinal diseases impact microcirculation and photoreceptors.
  • Early detection and monitoring are crucial for managing these conditions.

Purpose of the Study:

  • To assess retinal microcirculation and photoreceptor parameters in healthy individuals and patients with vascular retinal diseases.
  • To evaluate the clinical applications of adaptive optics ophthalmoscopy in vivo.

Main Methods:

  • Utilized adaptive optics ophthalmoscopy for high-resolution imaging of retinal structures.
  • Examined healthy individuals and patients with nonproliferative diabetic retinopathy, proliferative diabetic retinopathy, and Macular Telangiectasia type 2.

Main Results:

  • Observed increased wall-to-lumen ratio (WLR) and decreased cone density in proliferative diabetic retinopathy.
  • Found irregular cone mosaic and loss in Macular Telangiectasia type 2 patients.
  • Correlated higher WLR with diabetic retinopathy severity.

Conclusions:

  • Adaptive optics imaging effectively visualizes retinal vascular and photoreceptor changes in vascular diseases.
  • This technology aids in tracking disease progression and early detection of conditions like Macular Telangiectasia type 2.
  • Quantifying these parameters enhances understanding and management of retinal vascular diseases.