Related Experiment Video
Updated: Jun 5, 2026
07:11
Assessing Early Stage Open-Angle Glaucoma in Patients by Isolated-Check Visual Evoked Potential
Published on: May 25, 2020
Pattern electroretinogram association with spectral domain-OCT structural measurements in glaucoma.
C Bowd1, A Tafreshi, L M Zangwill
1Hamilton Glaucoma Center, Department of Ophthalmology, University of California, San Diego, La Jolla, CA 92037-0946, USA. cbowd@glaucoma.ucsd.edu
Eye (London, England)
|December 25, 2010
Summary
Pattern electroretinogram (PERG) amplitude weakly correlates with macular ganglion cell complex (GCC) thickness and retinal nerve fibre layer (RNFL) thickness in glaucoma patients. This suggests PERG primarily reflects inner retinal function.
Area of Science:
- Ophthalmology
- Neuroscience
- Medical Imaging
Background:
- Glaucoma is a progressive optic neuropathy characterized by retinal ganglion cell loss.
- Accurate assessment of retinal structure and function is crucial for early glaucoma detection and monitoring.
- Pattern electroretinogram (PERG) measures the electrical response of the retina to visual stimuli, while spectral domain-optical coherence tomography (SD-OCT) provides detailed structural imaging.
Purpose of the Study:
- To investigate the association between pattern electroretinogram (PERG) amplitude and key structural measurements obtained via spectral domain-optical coherence tomography (SD-OCT).
- Specifically, to correlate PERG amplitude with macular thickness, retinal nerve fibre layer (RNFL) thickness, and optic disc topography in glaucoma patients.
Main Methods:
- A cohort of 66 glaucoma patients and suspects underwent same-day testing with PERG and SD-OCT.
- Structural parameters analyzed included macular ganglion cell complex (GCC) thickness, macular thickness, RNFL thickness, neuroretinal rim area, and rim volume.
- Statistical analysis determined the R-squared (R(2)) values to quantify the association between PERG amplitude and each structural parameter.
Main Results:
- PERG amplitude showed significant, albeit weak, associations with macular GCC thickness (R(2) = 0.179), RNFL thickness (R(2) = 0.174), and overall macular thickness (R(2) = 0.095).
- No significant associations were found between PERG amplitude and optic disc topography parameters (neuroretinal rim area and rim volume).
- These associations remained significant for GCC and RNFL thickness even after adjusting for age and intraocular pressure.
Conclusions:
- PERG amplitude is significantly correlated with inner retinal structural measures, specifically macular GCC and RNFL thickness.
- The lack of correlation with outer retinal thickness suggests that PERG responses are predominantly driven by retinal ganglion cells.
- These findings support the utility of PERG as a functional correlate of retinal ganglion cell health in glaucoma management.
