Add Yahoo as a preferred source to see more of our stories on Google. Have you ever been watching TV or reading a book and all of a sudden had blurry vision in one eye? Maybe you closed one eye and ...

Learn about causes of gradual and sudden-onset blurred vision, from eyestrain and refractive errors to cataracts and strokes, ...

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 ...

Flora Hui works part-time in private practice as an optometrist. Angelina Duan works in private practice as an optometrist. The eye acts like a camera, capturing light through the front surface (the ...