Optoelectrophysiological stimulation of the human eye using fundus-controlled silent substitution technique

Sascha Klee; Dietmar Link; Patrick Bessler; Jens Haueisen

doi:10.1117/1.3528616

1 January 2011 Optoelectrophysiological stimulation of the human eye using fundus-controlled silent substitution technique

Sascha Klee, Dietmar Link, Patrick Bessler, Jens Haueisen

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Funded by: German Federal Ministry of Education and Research

Journal of Biomedical Optics, Vol. 16, Issue 1, 015002 (January 2011). https://doi.org/10.1117/1.3528616

Abstract

We design, characterize, and apply a novel optoelectrophysiological setup for a fundus-controlled silent substitution technique that accounts for interindividual variability in retina morphology and simultaneously monitors the stimulation site under investigation. We connect a digital color liquid crystal on silicon projector, an electron-multiplying imager, and a light-emitting diode to a fundus camera. The temporal and spatial characterization reveal a maximal contrast loss of 7% for the highest stimulation frequency (30 Hz) and maximum cutoff spatial frequencies of ∼120 cycles/deg. Two silent substitution flash sequences are applied to modulate selective activity in the short-wavelength-sensitive cone (S-cone) and combined long- and middle-wavelength-sensitive cone (LM-cone) pathways. Simultaneously, the visual evoked potentials are recorded. The data are compared to the grand average responses from a previous study that employed standard computer-screen presentation and showed very good latency matches. All the volunteers in the present examination exhibit differences between the S-cone and LM-cone evoked potentials (parameters mean values: peak-to-peak amplitude, N1 latency, and P1 latency for S-cone/LM-cone responses: 8 μV/15 μV, 113 ms/89 ms, 170 ms/143 ms). We demonstrate that the developed optoelectrophysiological setup simultaneously provides imaging, functional stimulation, and electrophysiological investigation of the retina.

©(2011) Society of Photo-Optical Instrumentation Engineers (SPIE)

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Sascha Klee, Dietmar Link, Patrick Bessler, and Jens Haueisen "Optoelectrophysiological stimulation of the human eye using fundus-controlled silent substitution technique," Journal of Biomedical Optics 16(1), 015002 (1 January 2011). https://doi.org/10.1117/1.3528616

Published: 1 January 2011

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