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Noninvasive Ultrasound Retinal Stimulation for Vision Restoration at High Spatiotemporal Resolution.

Xuejun Qian1,2, Gengxi Lu1,2, Biju B Thomas2

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Summary
This summary is machine-generated.

Direct ultrasound stimulation of the retina can evoke neural activity in visual centers, offering a non-invasive approach for visual prostheses in blind patients.

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Area of Science:

  • Ophthalmology
  • Neuroscience
  • Biomedical Engineering

Background:

  • Retinal degeneration causes irreversible vision loss.
  • Current treatments like retinal prostheses, optogenetics, and sonogenetics are invasive or risky.

Purpose of the Study:

  • To investigate ultrasound stimulation as a non-invasive method for visual restoration.
  • To assess the efficacy and resolution of ultrasound retinal stimulation in vivo.

Main Methods:

  • Utilized customized spherically focused and helical ultrasound transducers for retinal stimulation in rats.
  • Recorded evoked neural activity in visual centers (superior colliculus, V1) in normal and blind rats.

Main Results:

  • Ultrasound stimulation successfully evoked neuron activities in visual centers.
  • Achieved spatial resolution of 250 µm and temporal resolution of 5 Hz.
  • Demonstrated pattern generation capabilities using a helical transducer.

Conclusions:

  • Ultrasound stimulation is a safe and effective non-invasive visual prosthesis.
  • Offers high spatiotemporal resolution for potential clinical translation in blind patients.