astigmatism [əˈstɪɡməˌtɪzəm]

例句:

• In some cases, astigmatism can be corrected by an operation called refractive surgery, which reshapes the cornea.
  来自BBC
• Maybe you fall asleep in class because of uncorrected astigmatism.
  也许你在课堂上睡觉是因为你的眼睛散光.
  
• They have what is called astigmatism.
  他们有所谓散光.
  
• Under astigmatism even narrow parallel light beams will not combine into one point.
  有象散存在时甚至很窄的平行光束都不能会聚在一点.
  
• Two-thirds of people with short-sightedness also have significant astigmatism.
  来自BBC
• Most people have a slight astigmatism - it's rare for the cornea to have developed in a perfectly symmetrical way.
  来自BBC