Why astigmatism causes blurry vision, especially at night
Why astigmatism causes blurry vision, especially at night INSIDER 12/28/2020 insider@insider.com (Soo Youn ,Benjamin Bert) © aluxum/ Getty Images Astigmatism is a vision disorder that affects how the eye processes light. aluxum/ Getty Images Astigmatism occurs when the eye is shaped more like an oval than a sphere, which distorts the light that enters causing blurry vision. Astigmatism is fairly common, affecting about one in three Americans and it occurs more frequently as you age. Astigmatism causes blurry vision no matter what time of day, but it becomes more noticeabl...