Abstract
The VECP to checkerboard pattern revearsal stimuli is studied in a number of situations where the area and the spatial distribution of the stimuli around the central retina are altered. As the results, the VECP threshold is proved to be strongly related to the central part of the retina.
In many cases of emmetropia, myopia, hypermetropia and aphakia, the corelation between the VECP and subjective measurements are studied. Summarized data prove that there are ±0.5 dioptres differences between them.
Since Van der Tweel (1966) and Spekreijse (1966) reported checkerboard pattern reversal VECPs, a number of studies on this subject have been reported (Cambell & Maffei, 1970; Millodot & Riggs, 1970; Regan & Sperling, 1971;Behrman et al., 1972; Huber et al., 1972).
Because of the fact that this potential is simply sinusoidal in its waveform and no inter-individual difference is found, not only pure physiologists, but also clinicians have been trying to apply this method for diagnosing disease. We are also not an exception. A series of our studies (Chiba et al., 1975; Chiba, 1976; Chiba, in press) on the VECP in several diseases of the visual pathway suggested that it is quite a useful tool to study diseases which impair central vision.
In the present paper, investigation of the changes of pattern reversal VECPs in subjects with refractive errors is performed and those results are compared with subjective measurements.
Prior to beginning clinical studies, some physiological properties of the checkerboard pattern reversal VECP related to the central portion of the retina were studied.
This is a preview of subscription content, log in via an institution to check access.
Access this chapter
Tax calculation will be finalised at checkout
Purchases are for personal use only
Preview
Unable to display preview. Download preview PDF.
References
Adachi, E., Adachi, T., Kanaizuka, D. & Chiba, Y.: New stimulating devices for the checkerboard pattern reversal cortical evoked potentials. Folia Ophthal. Jap., 26, 516–518, 1975.
Behrman, J., Nissim, S. & Arden, G. B.: A clinical method for obtaining pattern visual evoked responses. ‘The Visual System Neurophysiology, Biophysics, and Their Clinical Applications’ Proc. 9th ISCERG Symp. in Brighton 1971, 199–203, Plenum Press, N. Y./Lond., 1972.
Bornstein, Y.: The pattern evoked responses (VER) in optic neuritis. Albrecht v. Graefes Arch. klin. exp. Ophthal., 197, 101–106, 1975.
Cambell, F. W. & Maffei, L.: Electrophysiological evidence for the existence of orientation and size detectors in the human visual system. J. Physiol., 270, 635–652, 1970.
Chiba, Y., Kanaizuka, D. & Adachi, E.: Studies on the visual evoked cortical potentials to checkerboard pattern reversal stimuli. Report 1. It’s applications in refraction. Jap. J. Clin. Ophthal., 29, 17–26, 1975.
Chiba, Y.: Studies on the visual evoked cortical potentials to checkerboard pattern reversal stimuli. Report 2. Central serous chorioretinopathy. Folia Ophthal. Jap., 27, 339–347, 1976.
Chiba, Y.: Checkerboard pattern reversal VECP in optic neuritis. Jap. Rev. Clin. Ophthal. (in press)
Huber, C., Adachi-Usami, E. & Kellermann, E.-J.: Bestimmung von Refraktionsfehlern mittels der visuell evozierten Antworten im EEG. Bericht über die 71. Zusammenkunft der Deutschen Ophthalm. Gesellschaft in Heidelberg 1971. J. F. Bergmann, München, 548–551, 1972.
McCormack, G. & Marg, E.: Computer-assisted eye examination. II. Visual evoked response meridional refractometry. Am. J. Opt. and Arch. Am. Acad. Opt, 50, 889–903, 1973.
Millodot, M. & Riggs, L. A.: Refraction determined electrophysiologically. Responses to alternation of visual contours. Arch. Ophthal., 84, 272–278, 1970.
Regan, D. & Sperling, H. G.: A method of evoking contour-specific scalp potentials by chromatic checkerboard patterns. Vision Res., 11, 173–176, 1971.
Regan, D.: Rapid objective refraction using evoked brain potentials. Invest. Ophthal., 12, 669–679, 1973.
Spekreijse, H.: Analysis of EEG responses in man, Junk Publishers, The Hague, The Netherlands, 1966.
Spekreijse, H., Tweel, L. H. van der & Zuidema, Th.: Contrast evoked responses in man. Vision Res., 13, 1577–1601, 1973.
Tweel, L. H. van der: Some problem in vision regarded with respect to linearity and frequency response. Ann. N. Y. Acad. Sci., 89, art. 5, 829–856, 1961.
Tweel, L. H. van der & Verduin Lunel, H. F. E.: Human visual responses to sinusoidally modulated light. Electroenceph. Clin. Neurophysiol, 18, 587–598, 1965.
Tweel, L. H. van der & Spekreijse, H.: Visual evoked responses. ‘The clinical value of electroretinography’ ISCERG symp. Ghent 1966, 83–94, Karger, Basel/N. Y., 1968.
Author information
Authors and Affiliations
Editor information
Rights and permissions
Copyright information
© 1977 Dr W. Junk b.v. Publishers
About this chapter
Cite this chapter
Chiba, Y., Kanaizuka, D., Adachi-Usami, E. (1977). Psychophysical and VECP Examinations of Emmetropia, Myopia, Hypermetropia and Aphakia. In: Lawwill, T. (eds) ERG, VER and Psychophysics. Documenta Ophthalmologica, vol 13. Springer, Dordrecht. https://doi.org/10.1007/978-94-010-1312-3_7
Download citation
DOI: https://doi.org/10.1007/978-94-010-1312-3_7
Publisher Name: Springer, Dordrecht
Print ISBN: 978-94-010-1314-7
Online ISBN: 978-94-010-1312-3
eBook Packages: Springer Book Archive