why is my vision blurry

The main reasons for blurry vision include common eye conditions like refractive errors (such as nearsightedness, farsightedness, astigmatism, and presbyopia), eye strain, dry eyes, and medication side effects. More serious causes can involve sudden vision changes due to stroke, retinal detachment, concussion, migraines, blood pressure fluctuations, or low blood sugar. Refractive errors occur when the eye does not focus light directly on the retina, causing distant or close objects to appear blurry. Eye conditions such as cataracts, glaucoma, diabetic retinopathy, macular degeneration, and infections can also blur vision. Sudden blurry vision can be an emergency signal and may indicate retinal detachment, stroke, or other neurological issues. If blurry vision happens suddenly, affects one eye, or is accompanied by pain, headaches, or other symptoms, urgent medical evaluation is important. For gradual or mild vision changes, an eye exam and corrective lenses or treatment for underlying conditions are typical solutions.