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Effect of pupillary dilatation in flash VER testing
Documenta Ophthalmologica. Advances in Ophthalmology
|November 15, 1986
Summary
Pupillary dilation is not necessary for reliable transient light flash visual evoked response (VER) testing in patients with media opacities. This finding simplifies perioperative eye evaluations by removing the need to alter pupil size.
Area of Science:
- Ophthalmology
- Neuroscience
- Clinical Electrophysiology
Background:
- Transient light flash visual evoked response (VER) testing is crucial for perioperative eye evaluations, especially with media opacities.
- Pupillary size can be difficult to determine or alter in these patients, potentially impacting VER results.
Purpose of the Study:
- To evaluate the effect of pupillary dilation on transient light flash VER amplitude and latency.
- To determine if pupil size alteration is necessary for reliable VER recordings in normal controls and patients with media opacities.
Main Methods:
- Monocular transient light flash VER testing was performed before and after pupillary dilation.
- Responses were recorded using a Grass PS-22 photostimulator and averaged on a Nicolet CA-1000 clinical averager.
- Testing included normal controls and patients with various media opacities.
Main Results:
- Pupillary dilation did not consistently shorten VER latencies.
- No significant increase in recorded VER amplitudes was observed with pupillary dilation.
- Iris color did not appear to influence the recorded VER amplitudes or latencies.
Conclusions:
- Pupillary dilation is not essential for obtaining reliable transient flash VER recordings under the tested conditions.
- This simplifies the perioperative assessment of eyes with media opacities.
- Standardized testing protocols can be maintained without pupil manipulation.