There are a variety of reasons to account for blurred vision. The most typical causes of blurred vision are refractive errors. If you are suffering from myopia, hyperopia, astigmatism or presbyopia, you are likely to experience the loss of sharpness of eyesight. But blurry vision can also indicate other serious eye problems or diseases such as cataract, glaucoma, age-related macular degeneration, retinal detachment, diabetic retinopathy, a stroke or brain hemorrhage or brain tumor. I advise you to go to see a doctor to have an examination.
It is not normal. When you look down, you should still have the clear vision if your eyes are healthy. You may have the eyes infection or the invisible bacterium in the eyes. You could use the eyes drops to release the symptom. You could also do the warm compress to make the eyes feel comfortable. You should protect the eyes carefully.