Why Is My Vision Blurry? Common Causes and When to Worry blurry vision · cataracts · diabetes · dry eye · eye emergency · macular degeneration · presbyopia · stroke warning signs · vision changes · Oct 09, 2026 Most blurry vision comes from something simple, like needing new glasses or dry eye. But sudden blur, especially in one eye, can be an emergency. Here's how to tell the difference.