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Updated: Jun 28, 2026

Assessing Early Stage Open-Angle Glaucoma in Patients by Isolated-Check Visual Evoked Potential
Published on: May 25, 2020
Ganglion cell loss and dysfunction: relationship to perimetric sensitivity
Neville Drasdo1, Katharine E Mortlock, Rachel V North
1School of Optometry and Vision Sciences, Cardiff University, Cardiff, Wales, United Kingdom.
This study introduces two methods to quantify neural damage using visual field test data, estimating retinal ganglion cell loss in glaucoma patients. These methods provide age-invariant percentage loss calculations for better diagnostic accuracy.
Area of Science:
- Ophthalmology
- Neuroscience
- Medical Imaging
Background:
- Glaucoma is a leading cause of irreversible blindness.
- Accurate quantification of neural damage is crucial for glaucoma management.
- Perimetric data offers a non-invasive method for assessing visual field function.
Purpose of the Study:
- To present two novel methods for quantifying neural damage from perimetric data.
- To discuss the theoretical implications of these quantification techniques.
- To estimate retinal ganglion cell (GC) loss in glaucoma patients.
Main Methods:
- Utilized a model of retinal ganglion cell receptive field density.
- Applied age-related change compensation to perimetric sensitivity data.
- Established a functional relationship between perimetric sensitivity and GC survival for loss quantification.
Main Results:
- Presented data from the 24-2 test pattern array for the right eye.
- Developed age-invariant percentage calculations for GC loss.
- Proposed simple models linking receptive field density to visual field sensitivity.
Conclusions:
- Derived equations to estimate GC loss in glaucoma based on visual field sensitivity.
- Proposed two equations to cover a range of sensitivities (0 dB to 33 dB).
- Discussed the quantitative relationship between visual field defects and pattern electroretinograms.
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