Visual distortion is due to lesions of the retina or macula, resulting in distortion and alteration of the image of the viewing object. Etiology: In some macular lesions or retinal or choroidal lesions near macula (such as retinal blunt contusion, etc.), due to obvious edema of retina, the interval of optic cells on retina increases and widens, or due to adhesion of retina (especially macula area), scarring contraction traction, so that optic cells are crowded in one piece or overlapped, etc., when looking at something, the shape and size of the object will have great changes, such as the object becomes smaller (microsightedness When you look at something, the shape and size of the object will change greatly, such as the object becomes smaller (microphoria) or the object becomes larger (macropsia). At the same time, the distortion of visual objects is also related to the long-term photodamage of macula, genetic, metabolic and nutritional factors.