You may have noticed that your vision is only blurry when you drive at nighttime, but during the day you feel you see well. There are multiple causes for this, including cataracts, glaucoma, macular degeneration, uncorrected refractive error (do you need glasses?) and most commonly, dry eye disease. Factors that might make this worse are a dirty windshield, glare from oncoming headlights and poor street lamp lighting.
So what can you do?