astigmatism

• 影响视力的医学状况，通常由角膜或晶状体曲率不规则引起，导致视物模糊；也指光学系统中类似缺陷，即来自同一点的光线不能汇聚于同一焦点。

A medical condition affecting the eyesight, typically caused by an irregular curvature of the cornea, leading to blurred vision; also refers to a similar defect in optical systems where light rays from a single point do not converge at a single focal point.

不可数

1. Eye conditionB2formalmedical

   A common vision condition caused by an irregular curvature of the cornea or lens, leading to blurred or distorted vision.

   散光

   • The optometrist diagnosed her with astigmatism during the eye exam.
   • People with astigmatism often see lines as wavy or blurry.
   • Corrective lenses can effectively treat astigmatism.

2. Optical defectC1formalscientific

   A defect in a lens or optical system where light rays from a single point fail to meet at a single focal point, causing image distortion.

   光学像差

   • The telescope's astigmatism was corrected by adjusting the lens alignment.
   • Astigmatism in microscopes can reduce image clarity.
   • Engineers minimized astigmatism in the camera's optical system.