Abstract
The in variance of visibility across the visual field, obtained by magnifying the stimulus (in inverse proportion to the human cortical magnification factor) and reducing its luminance (in inverse proportion to Ricco’s area) with increasing eccentricity, provides a novel method for clinical investigation of visual fields. In this optimal perimetry normal thresholds as a function of visual field location are horizontal lines called perimetrograms. Conseqently, visual field defects are readily recognized as pits, as in an audiogram.
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.
Similar content being viewed by others
References
. Enroth-Cugell, C. and Shapley, R.M. Flux, not retinal illumination, is what cat retinal ganglion cells really care about. J. Physiol. 233: 311–326 (1973).
. Inui, T., Mimura, O. and Kani, K. Retinal sensitivity and spatial summation in the foveal and parafoveal regions. J. Opt. Soc. Am. 71: 151–154 (1981).
. Rovamo, J. Cortical magnification factor and contrast sensitivity to luminance- modulated chromatic gratings. Acta Physiol. Scand. 119: 365–371 (1983).
Rovamo, J., Leinonen, L., Laurinen, P. and Virsu, V. Temporal integration and contrast sensitivity in foveal and peripheral vision. Perception, in press.
Rovamo, J. and Raninen, A. Critical flicker frequency and M-scaling of stimulus size and retinal illuminance. Vision Res., in press.
. Rovamo, J. and Virsu, J. An estimation and application of the human cortical magnification factor. Expl. Brain Res. 37: 495–510 (1979).
. Rovamo, J. and Virsu, V. Isotropy of cortical magnification and topography of striate cortex. Vision Res. 24: 283–286 (1984).
. Rovamo, J., Virsu, V., Laurinen, P. and Hyvärinen, L. Resolution of gratings oriented along and across meridians in peripheral vision. Invest. Ophthalmol. Vis. Sci. 23:666–670 (1982).
. Rovamo, J., Virsu, V. and Näsänen, R. Cortical magnification factor predicts the photopic contrast sensitivity of peripheral vision. Nature 271: 54–56 (1978).
. Virsu, V. and Rovamo, J. Visual resolution, contrast sensitivity, and the cortical magnification factor. Expl. Brain Res. 37: 475–494 (1979).
. Virsu, V., Rovamo, J., Laurinen, P. and Nasanen, R. Temporal contrast sensitivity and cortical magnification. Vision Res. 22: 1211–1217 (1982).
. Wilson, M.E. Invariant features of spatial summation with changing locus in the visual field. J. Physiol. 207: 611–622 (1970).
Author information
Authors and Affiliations
Editor information
Rights and permissions
Copyright information
© 1985 Dr. W. Junk Publishers, Dordrecht, The Netherlands
About this chapter
Cite this chapter
Rovamo, J., Raninen, A., Virsu, V. (1985). The Role of Retinal Ganglion Cell Density and Receptive-Field Size in Photopic Perimetry. In: Heijl, A., Greve, E.L. (eds) Sixth International Visual Field Symposium. Documenta Ophthalmologica Proceedings Series, vol 42. Springer, Dordrecht. https://doi.org/10.1007/978-94-009-5512-7_87
Download citation
DOI: https://doi.org/10.1007/978-94-009-5512-7_87
Publisher Name: Springer, Dordrecht
Print ISBN: 978-94-010-8932-6
Online ISBN: 978-94-009-5512-7
eBook Packages: Springer Book Archive