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The monocularly elicited visual evoked response in chronic glaucoma
Annals of Ophthalmology
|April 1, 1978
Summary
Transscleral visual evoked cortical response (VER) offers an objective way to measure visual field loss in chronic open-angle glaucoma patients. This method is valuable for those with asymmetric disease, aiding in monitoring glaucoma progression.
Area of Science:
- Ophthalmology
- Neuroscience
- Medical Technology
Background:
- Chronic open-angle glaucoma often causes asymmetric visual field loss.
- Accurate assessment of visual field deficits is crucial for managing glaucoma.
- Subjective visual field testing can be unreliable in some patients.
Purpose of the Study:
- To evaluate the monocularly elicited transscleral visual evoked cortical response (VER) as an objective measure of visual field loss in chronic open-angle glaucoma.
- To determine the correlation between VER amplitude and remaining visual field.
- To assess the utility of transscleral VER in patients with asymmetric glaucoma.
Main Methods:
- Monocular transscleral visual evoked cortical response (VER) was measured in glaucoma patients.
- Visual field loss was assessed and confirmed to be statistically different between eyes.
- Correlation analysis was performed between VER amplitude and visual field perimetry data.
Main Results:
- A statistically significant difference in peak VER amplitude was observed between the two eyes.
- A good linear correlation was found between monocular transscleral VER amplitude and the amount of visual field remaining.
- A red stimulus yielded the best correlation for eliciting the VER.
Conclusions:
- Monocular transscleral VER provides an objective measurement of visual field in chronic open-angle glaucoma.
- This technique is particularly valuable for patients with asymmetric disease and unreliable subjective responses.
- Transscleral VER may assist in monitoring the progression of glaucomatous disease.