Prolonged looking at cell phones may cause astigmatism, but not all astigmatism is caused by looking at cell phones, eye inflammation, eye trauma can also lead to astigmatism. 1. Improper use of eyes: If the patient looks at the cell phone or computer for a long time, or squints a lot, and uses the eyes in an incorrect posture, it may compress the cornea and make the cornea change its shape, thus easily causing astigmatism. 2. Ocular inflammation: astigmatism may also be caused by ocular inflammation, such as keratitis, etc. If the patient’s condition is serious, corneal ulcers may also appear, and after the condition recovers, the patient’s cornea may show scarring, which may cause irregular astigmatism. 3. Trauma factors: when the patient’s eyes suffer from trauma, it may lead to corneal curvature changes, corneal laceration of the patient’s deep stromal layer wound healing, but also the formation of corneal scar, thus causing astigmatism. Therefore, in daily life, people should use their eyes reasonably and avoid playing with cell phones for a long time to protect their eyes. Patients with astigmatism are advised to consult a doctor in time to assess their condition and follow the doctor’s instructions for treatment.