Blurred or double vision requires different treatments depending on the underlying causes. First, if it's due to eye strain, which commonly occurs after prolonged use of electronic devices like computers and smartphones or staying up late, the recommended approach is to reduce screen time, rest more, and typically the condition will resolve on its own. Second, refractive errors such as nearsightedness, farsightedness, astigmatism, or wearing improperly prescribed glasses can also cause blurred or double vision. In this case, an eye exam is necessary to get the correct prescription, and the symptoms usually disappear after obtaining the right glasses. Third, certain eye conditions affecting the cornea, lens, vitreous, retina, or optic nerve may be the cause. A visit to an ophthalmologist is essential for diagnosis and appropriate treatment. Fourth, some brain - related issues, such as tumors, lesions, vascular problems, or nerve disorders, can also lead to blurred or double vision. In such cases, consultation with a neurologist or neurosurgeon is required. Therefore, if you experience blurred or double vision, it's important to see an eye specialist first to determine the cause and receive targeted treatment.