Hyperopia is not caused by looking at cell phones, it may be caused by heredity, diabetes and other reasons. 1. Heredity: It may cause hyperopia. According to the nature of hyperopia, it can be categorized into axial hyperopia, curvature hyperopia and refractive index hyperopia. Axial hyperopia, with its shorter eye axis, is a common type of hyperopia, and its anatomical and structural features are easily inherited. 2. Diabetes mellitus: When diabetes mellitus is treated, blood glucose may decrease rapidly, and the osmotic pressure of the lens and vitreous humor also decreases rapidly, causing the water in the lens to leak out, causing the lens to become flattened, leading to a decrease in refractive power and the onset of hyperopia. This is a temporary change and the hyperopia will disappear when the blood sugar level slowly returns to normal. Hyperopia can be treated by going to an eye hospital and having a checkup under the guidance of a doctor.