Current position
Assoc. Professor
Head Biotechnology Transfer Unit (BTU)
Executive Director Centre for Visual Sciences (CVS)
Research interests
My initial interest in the optical designs of invertebrate eyes led me to examine how visual systems squeeze real-time visual information into brains of very limited information capacity. My subsequent research into adaptive neural processing has lead to new glaucoma detection devices, the FDT and Matrix Perimeters, now being marketed by Carl Zeis Meditec and Welch Allyn. Dr. Andrew James and I are now extending that work to provide objective non-contact perimetry using multifocal pupillography with Seeingmachines Ltd. Other recent work includes the adaptive dynamics of following eye movements; the processing of texture, and brightness; and methods for diagnosing neurological disorders like multiple sclerosis.
Selected Publications
Maddess T, Nagai Y, Victor JD, Taylor RRL (2007) Multi-level isotrigon textures. JOSA A24:278-293.
Maddess T, James AC, Ruseckaite R, Bowman EA (2006) Hierarchical decomposition of dichoptic multifocal visual evoked potentials. Visual Neurosci 23:703-712.
Ruseckaite R, Maddess T, Danta G, Lueck C, James AC (2005) Sparse multifocal stimuli for the detection of multiple sclerosis. Annal Neurology 57:904-913.
Maddess T, Nagai Y, James AC, Ankiewicz A (2004) Binary and ternary textures containing higher order spatial correlations. Vision Res 44:1093-1113.
Maddess T, Rascher U, Siebke K, Lüttge U, Osmond B (2002) Spatio-temporal variations in chlorophyll fluorescence during the phases of CAM, and during endogenous rhythms in continuous light, in thick leaves of Kalanchoë daigremontiana. Plant Biol 4:446-455.
Maddess, T., James, A.C., Goldberg, I., Wine, S. & Dobinson, J. (2000). A frequency doubling illusion based multiregion PERG for glaucoma. Invest. Ophthalmol. Vis. Sci., 41, 3818-3826.
Maddess, T., Goldberg, I., Wine, S., Dobinson, J., Welsh, A.H. & James, A.C. (1999). Testing for glaucoma with the spatial frequency doubling illusion. Vision Res., 39, 4258-4273.
Davey M., Maddess T. and Srinivasan M.V. (1998) The spatiotemporal properties of the Craik-O'Brien-Cornsweet effect are consistent with "filling-in". Vision Res. 38, 2037-2046.
Ibbotson MR, Mark RF, Maddess T (1994) Spatiotemporal response properties of direction selective neurons in the nucleus of the optic tract and dorsal terminal nucleus of the wallaby. J Neurophysiol 72:2927-2943.
Maddess T, Ibbotson MR (1992) Human ocular following responses are plastic: evidence for control by temporal frequency-dependent cortical adaptation. Exp Brain Res 91:525-538.
Maddess T. and Henry G.H. (1992) Nonlinear visual responses and visual deficits in ocular hypertensive and glaucoma subjects. Clin. Vis. Sci. 7, 371-383.
Maddess T, McCourt ME, Blakeslee B, Cunningham RB (1988) Factors governing the adaptation of cells in Area-17 of the cat visual cortex. Biol Cybern 59:229-236.
Maddess T (1985) Adaptive processes affecting the response of the motion sensitive neuron H1. Proc IEEE SMC 85:862-866.
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