Astigmatism: Causes, Symptoms | 合法醫療器材資訊網

2020年11月9日—AstigmatismTreatment·Correctivelenses.Thatmeansglassesorcontacts.Ifyouhaveastigmatism,yourdoctorwillprobablyprescribeaspecial ...

 Astigmatism[1] is a condition in which your eye[2], especially your cornea or the clear front part of the eyeball, isn’t completely round.

Ideally, an eyeball is shaped like a perfectly round ball. Light comes into it and bends evenly, which gives you a clear view. But if your cornea is shaped more like a football, light gets bent more in one direction than another. That means only part of an object is in focus. Things at a distance may look blurry and wavy.

It’s common to have astigmatism along with nearsightedness[3] (myopia) or farsightedness[4] (hyperopia). These three conditions are called refractive errors because they involve how your eyes bend (refract) light. 

Astigmatism is fairly easy for an eye doctor to fix with glasses, contacts, or surgery.