What Causes Sudden Blurry Vision? Sudden Blurry vision can be worrying, especially when your eyesight becomes unclear without warning. Why does sight suddenly become hazy? Reasons can vary from minor issues like dry eye syndrome or an outdated spectacle prescription to critical conditions involving the retina, optic nerve, or brain. https://medium.com/@maheshnadgir820/what-causes-sudden-blurry-vision-2456a4cab26b