Invited Talks and Conference Presentations

" Contribution of signals from magnocellular and parvocellular pathways to spatial vision", October 2008, Kongsberg Vision Meeting, Kongsberg, Norway.

" Assessment of ganglion cell dysfunction in patient with glaucoma using a psychophysical paradigm", September 2007, University of Chicago Pokorny and Smith Symposium, Chicago, U.S.A.

" Systematic errors in vernier acuity arising from contrast mismatch", July 2007, International Color Vision Society Meeting, Belem, Brazil.

"Assessment of magnocellular ganglion cell dysfunction using a psychophysical paradigm", September 2005, North American Perimetry Society Meeting, Skaneateles , NY.

"Do MC and PC pathways deliberately avoid S-cone input?", July 8, 2005, International Color Vision Society, Lyon, France.

"Comparison of conventional, FDT, and Gabor-based perimetry in the macula", May 2005, Association for Research in Vision and Ophthalmology Annual Meeting, Fort Lauderdale, Florida.

"The origin of the chromatic response of magnocellular ganglion cells", October 2004, Fall Vision Meeting (Satellite meeting of Optical Society of America), Rochester, New York.

"Coding of positions of moving targets in chromatic and achromatic pathways", March 2004. University of Houston, College of Optometry, Houston, Texas.

"A new technique for measuring cone inputs to visual neurons", May 2003, Association for Research in Vision and Ophthalmology Annual Meeting Annual Meeting, Fort Lauderdale, Florida.

"A new technique for measuring cone inputs to visual neurons", October 2003, Fall Vision Meeting (Satellite meeting of Optical Society of America), Tucson, Arizona.

"A single mechanism for both luminance and chromatic grating vernier tasks; evidence from temporal summation", July 2003, International Color Vision Society, Seattle, Washington.

"Polarity reversal as a tool for isolating luminance and chromatic contributions to a vernier task", May 2003, Association for Research in Vision and Ophthalmology Annual Meeting, Fort Lauderdale, Florida.

"Examination of mechanisms underlying the frequency doubling illusion", October 2002, Fall Vision Meeting (Satellite meeting of Optical Society of America), San Francisco, California

"Grating vernier thresholds as a function of temporal & spatial frequency: a single retinal mechanism?", May 2002, Association for Research in Vision and Ophthalmology Annual Meeting, Fort Lauderdale, Florida.

"Characteristic of impulse trains of macaque retinal ganglion cells evoked by moving gratings", July 2002 Federation of American Societies for Experimental Biology (FASEB) conference, Saxtons River, Vermont.

"Coding of Position of Achromatic and Chromatic Edges by Retinal Ganglion Cells", July 2001, International Color Vision Society, Cambridge, England.

"Induction from rod and cone modulation", May 2001, Association for Research in Vision and Ophthalmology Annual Meeting, Fort Lauderdale, Florida.

"Rod-cone interactions from rod induction", November 2000, Department of Psychology, University of Chicago, Chicago, Illinois.

"Rod-cone interactions revealed with temporally modulated stimuli", October 2000, Department of Biomedical Engineering, University of Northwestern, Chicago, Illinois.

"Rod-cone interactions revealed with temporally modulated stimuli", October 2000, Optical Society of America Annual Meeting, Providence, Rhode Island.

"Control of the modulation of human photoreceptors", May 1999, The Association for Research in Vision and Ophthalmology Annual Meeting, Fort Lauderdale, Florida.

"Decreasing surround size fails to alter chromatic discrimination", May, 1998, The Association for Research in Vision and Ophthalmology Annual Meeting, Fort Lauderdale, Florida.

"Studies of absolute thresholds", 1998, Computational Neuroscience Seminar, University of Chicago, Chicago, Illinois.

"Studies of Foveal Absolute Threshold Detection", May 1997, The Association for Research in Vision and Ophthalmology Annual Meeting, Fort Lauderdale, Florida.