Abstract
In case of multiple sclerosis the discrimination of double-pulses of light is a more sensitive test of local damage in the visual field than visual acuity and critical flicker fusion frequency (Galvin et al., 1976, 1977). The same technique is also a diagnostic tool for detecting glaucoma (Stelmach et al., 1986). Given these facts, it is surprising that the method of double-pulse resolution is rarely used in clinical vision research. This may be a consequence of the apparent contradictions between a number of studies on the foveal discrimination of double-pulses (Mahneke, 1958; Venables, 1963; Kietzman and Sutton, 1968; Boynton, 1972), as well as methodological problems. I tried to resolve the difficulties by measuring double-pulse resolution by means of an extended version of the paradigm of Stelmach et al. (1986). It allows the quasi-simultaneous measurement of double-pulse resolution at 9 locations in the visual field. I also employed an adaptive psychophysical procedure which provides a maximum likelihood estimate of the threshold parameter (Treutwein, 1989).
© 1993 Optical Society of America
PDF ArticleMore Like This
Alexander I. Cogan, Maureen Clarke, and Andrew Rossi
FH3 OSA Annual Meeting (FIO) 1987
Chris Hudson and John M. Wild
NMA.3 Noninvasive Assessment of the Visual System (NAVS) 1993
Chris A. Johnson, Craig W. Adams, Richard A. Lewis, and John L. Keltner
WB2 Noninvasive Assessment of the Visual System (NAVS) 1987