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Correlating structure with function in end-stage glaucoma.

Eytan Z Blumenthal1, Amjad Horani, Rajesh Sasikumar

  • 1Department of Ophthalmology, Hebrew University-Hadassah Medical Center, Jerusalem, Israel.

Ophthalmic Surgery, Lasers & Imaging : the Official Journal of the International Society for Imaging in the Eye
|June 6, 2006
PubMed
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In end-stage glaucoma patients, scanning laser polarimetry shows a thin retinal nerve fiber layer. Structure and function correlations were not evident, despite some remaining nerve fiber layer thickness.

Area of Science:

  • Ophthalmology
  • Medical Imaging
  • Glaucoma Research

Background:

  • End-stage glaucoma is characterized by significant visual field loss.
  • Assessing the relationship between retinal nerve fiber layer structure and visual function is crucial.

Purpose of the Study:

  • To correlate structural measurements of the retinal nerve fiber layer with functional visual field data in end-stage glaucoma.
  • To investigate the utility of scanning laser polarimetry (SLP) in evaluating structural integrity.

Main Methods:

  • Fifty-six eyes from 48 end-stage glaucoma patients were analyzed.
  • Scanning laser polarimetry (GDx-VCC) was used for retinal nerve fiber layer imaging.
  • Standard automated perimetry assessed visual field parameters.

Related Experiment Videos

Main Results:

  • Patients exhibited a mean visual field deviation of -26.75 dB.
  • Retinal nerve fiber layer thickness measurements (TSNIT average) were approximately 29.76 microm.
  • A weak correlation (R2 values as low as 0.00001) was observed between structure and function.

Conclusions:

  • Eyes with end-stage glaucoma retain a thin, measurable retinal nerve fiber layer on SLP.
  • A flattened GDx TSNIT pattern was observed.
  • The correlation between structural nerve fiber layer thickness and visual function was not evident in this cohort.