Blurred eyes are a very common condition and can be caused by many factors. Some common causes include refractive problems, pathologies of the eye itself, trauma, and secondary pathologies of other organ systems. Refractive errors, including myopia, hyperopia, and astigmatism, can cause blurred vision. Traumatic injuries to the eye, such as blunt contusions, penetrating injuries, and ruptures, can also cause blurred vision if they damage the eye. Diseases of the eye itself, such as conjunctivitis, keratitis, cataracts, glaucoma, and central retinal vein blockage can occur. Transient ischemic and hypoxic diseases of the brain, such as cerebral infarction, posterior circulation ischemia and other intracranial system diseases, which are common in the elderly, can cause temporary ischemia and hypoxia in the blood vessels and can result in blurred eyes at times. Of course, prolonged close eye use, prolonged exposure to electronic products, poor rest and sleep, and excessive fatigue may all cause blurred vision in the eyes. As mentioned above, blurred vision sometimes occurs mainly due to refractive error, organic eye disease and intracranial system diseases. Therefore, when blurred vision occurs in the eyes, it should be taken seriously.