Astigmatism (uh-STIG-muh-tiz-um) is a type of refractive error where one or more of the eye’s surfaces are not smooth and/or round. It is broadly classified into two types: regular and irregular.

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 ...

The eye acts like a camera, capturing light through the front surface (the cornea) and focusing it onto the "film" at the back of the eye (retina). To get a clear picture, the eyeball and all of its ...

Have you ever gone to the optometrist for an eye test and were told your eye was shaped like a football? Subscribe to our newsletter for the latest sci-tech news updates. Or perhaps you've noticed ...

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 ...