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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

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Doppler Optical Coherence Tomography of Retinal Circulation
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Structure-Function Relationship between Frequency-Doubling Technology Perimetry and Optical Coherence Tomography in

Isabel Fuertes-Lazaro1, Ana Sanchez-Cano, Antonio Ferreras

  • 1Ophthalmology Department, Miguel Servet University Hospital, Aragon Health Sciences Institute, Zaragoza, Spain.

Ophthalmologica. Journal International D'Ophtalmologie. International Journal of Ophthalmology. Zeitschrift Fur Augenheilkunde
|November 28, 2014
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Summary

Frequency-doubling technology perimetry (FDT) and optical coherence tomography (OCT) show poor agreement in glaucoma assessment. These methods evaluate distinct aspects of glaucomatous optic neuropathy, aiding structure-function understanding.

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Area of Science:

  • Ophthalmology
  • Medical Imaging
  • Glaucoma Research

Background:

  • Glaucomatous optic neuropathy affects the retinal nerve fibre layer (RNFL).
  • Assessing structural and functional changes is crucial for diagnosis and management.
  • Frequency-doubling technology perimetry (FDT) and optical coherence tomography (OCT) are common diagnostic tools.

Purpose of the Study:

  • To evaluate the correlation between RNFL thickness measured by OCT and FDT outcomes.
  • To understand the structure-function relationship in glaucoma using these imaging modalities.

Main Methods:

  • Prospective selection of 62 healthy individuals and 72 glaucoma patients.
  • All participants underwent reliable FDT and OCT imaging.
  • Pearson correlation analysis was performed between FDT threshold values and OCT-measured RNFL thickness.

Main Results:

  • Mild to moderate correlations were observed between specific FDT points and RNFL thickness along the vertical axis.
  • The strongest correlation was found between the nasal superior area of FDT and RNFL thickness at the 7-o'clock position (r=0.434, p<0.001).

Conclusions:

  • The limited agreement between FDT and OCT suggests they capture different aspects of glaucomatous optic neuropathy.
  • Findings support the use of both OCT and FDT for a comprehensive assessment of glaucoma.
  • This study enhances the understanding of the structure-function relationship in glaucoma.