The invention relates to a retina stimulator with grid vision detection. The retina stimulator comprises an image processing device and an implantation device; the image processing device carries out graying processing on the initial image to obtain a grayscale image, obtains a histogram of the grayscale image according to the grayscale image, obtains feature information of the grayscale image according to the grayscale image and the histogram, and judges whether the grayscale image is a grating vision image or not according to a first type of preset threshold value; if the gray level image is a grating vision image, binarization processing is carried out to obtain a binary image; the binary image and a plurality of preset mapping lines obtain the number of corresponding pixel points with target pixel value projections on each preset mapping line, the target preset mapping line is determined based on the number of the corresponding pixel points with the target pixel value projections and a second type of preset threshold, and the bar grating direction of the initial image is determined; a visual signal is transmitted to the implant device based on the determined grid direction; and the implant device converts the visual signal into an electrical stimulation signal to stimulate ganglion cells or bipolar cells of the retina.
Retina stimulator with grid vision detection function