Electrophysiological Determination of Retinal Sensitivity to Color After Intense Monochromatic Light Adaptation.

Wolbarsht, Myron L.

doi:10.21236/ada063852

Cited by 2 publications

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References 27 publications

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“…Although the stimuli are different for the different recovery modalities, it is believed that most of the time difference is because OKN recovery involves a more complex neural mechanism. This may be neuronal activity in -ACTA OPHTHALMOLOGICA SCANDINAVICA 1995 the retina and/or in the post retinal visual pathways (Wolbarsht 1978(Wolbarsht , 1980Dowling 1987). This finding strongly supports the relevance of using visual readaptation measured as recovery of OKN after glare inducing flash as a measure of disturbance in the neural visual system (Tengroth et al 1976;Bergman et al 1979Bergman et al , 1980Linde 1980).…”

Section: Onset Latenciesmentioning

confidence: 99%

Receptor and neural visual readaptation after exposure to colored flash

Persson

Söderberg

Tengroth

1995

Acta Ophthalmologica Scandinavica

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The time needed to recover optokinetic nystagmus or electroretinography complexes after a glare inducing flash was measured to study the receptor and neural visual readaptation. Electroretinographs and optokinetic nystagmus were evoked with low intensity stimuli. The light from a flash tube was filtered with an interference filter (Tmax = 536 or 622 nm) and evenly distributed into a Goldmann hemisphere observed by the subject. The Recovery of the amplitude of the a-wave of the electroretinography is quicker than the recovery of optokinetic nystagmus after a low intensity glare inducing flash. The recovery time was shorter for a red than for a green flash of equivalent dose for both recovery modalities. The time difference between electroretinography a-wave and optokinetic nystagmus recovery was the same and independent of glare inducing flash wavelength. The recovery of the amplitude of the a-wave of the electroretinography was quicker than the recovery of optokinetic nystagmus after a low intensity glare inducing flash. This time difference between the recovery modalities may in part be due to the difference between the physiological stimuli used, but it is believed that most of the time difference is because the recovery of optokinetic nystagmus monitors more of the afferent visual pathway with complex post receptor neural mechanisms than the recovery of the a-wave.

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