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Full-Circle Cauterization of Limbal Vascular Plexus for Surgically Induced Glaucoma in Rodents
Published on: February 15, 2022
Functional and structural changes in a canine model of hereditary primary angle-closure glaucoma
Sinisa D Grozdanic1, Helga Kecova, Matthew M Harper
1Department of Veterinary Clinical Sciences, College of Veterinary Medicine, Iowa State University, Ames, Iowa 50011, USA. sgrozdan@iastate.edu
Investigative Ophthalmology & Visual Science
|August 8, 2009
Summary
Canine glaucoma shows progressive intraocular pressure rise and optic nerve dysfunction. This study details structural and functional changes in a canine model, revealing retinal ganglion cell loss.
Area of Science:
- Ophthalmology
- Veterinary Medicine
- Genetics
Background:
- Hereditary primary angle-closure glaucoma is a significant cause of vision loss in canines.
- Understanding the progression of this condition is crucial for developing effective treatments.
Purpose of the Study:
- To characterize the functional and structural changes associated with hereditary primary angle-closure glaucoma in a canine model.
- To investigate the relationship between intraocular pressure (IOP) and retinal function over time.
Main Methods:
- Intraocular pressure (IOP) was monitored in glaucomatous dogs from 8 to 30 months of age.
- Retinal function was assessed using electroretinography (ERG).
- Anterior segment structures were examined via gonioscopy and high-frequency ultrasonography (HFU).
Main Results:
- A progressive increase in IOP was observed with age, significantly elevated after 20 months.
- High-frequency ultrasonography revealed complete iridocorneal angle collapse by 20 months.
- Pattern ERG showed significantly reduced amplitudes in glaucomatous dogs, indicating optic nerve dysfunction, alongside histologic evidence of retinal ganglion cell loss.
Conclusions:
- Canine hereditary angle-closure glaucoma is characterized by a progressive increase in intraocular pressure.
- The condition leads to significant optic nerve dysfunction and retinal ganglion cell loss.
- This canine model provides valuable insights into the pathogenesis of angle-closure glaucoma.
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