1. An image correction method for a visually impaired person comprising: a dividing process of dividing a subject to be photographed into at least two zones; a photographing process of, by an image photographing unit, photographing each of the at least two divided zones; an image correcting process of correcting skewness of an image of each of the at least two photographed zones; and an image synthesizing process of synthesizing the corrected images of the at least two photographed zones into a single image, wherein the image synthesizing process includes: an overlapping region setting process of overlapping the at least two divided zones to a set range to set overlapping regions to be photographed; an overlapping region identifying process of comparing pixel information values on the overlapping regions to identify the overlapping regions; and an image synthesizing process of overlapping points having the same pixel information values on the overlapping regions to synthesize the corrected images into the single image.