Ortigoza-Ayala L, Ruiz-Huerta L, Caballero-Ruiz A, Kussul E

Language: Spanish
References: 10
Page: 235-238
PDF size: 192.67 Kb.

ABSTRACT

Purpose: Since 1960 many attempts have been made in order to develop visual prostheses for the blind. Most of the devices supported the production of phosphenes through electrical stimulation with microelectrodes at the retina, optic nerve, lateral geniculate or occipital lobe but are incapable to reconstruct a coherent retinotopic map (coordinate match between the image and the visual percept of the patient); furthermore they display important restrictions at the biomaterial level that hinder their final implant through surgical techniques that at the present time offers more risks than real benefits for the patient.
Methods: Considering the new theories about intermodal perception it’s possible to acquire visual information through other senses; that’s the reason, the Grupo de Micromecánica y Mecatrónica del Centro de Ciencias Aplicadas y Desarrollo Tecnológico de la Universidad Nacional Autónoma de México, describes the experimental design and psychophysical data necessary for the construction of a visual sensory substitution prostheses with a vibrotactile system.
Results: The vibrotactile mechanism locates different bars over the epdiermis in a predetermine way to reproduce a point by point matrix order in a logic sequence of rows and columns that allows the construction of an image with an external device that doesn’t require invasive procedures.

REFERENCES

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