astigmatic

/,æstig'mætik/

Thân thiện

An optometrist uses a lens to correct an astigmatic patient's vision.

Definition

1. Adjective:
   • Relating to astigmatism: Describes a condition of the eye or a lens where light rays do not converge to a single focal point, causing blurred or distorted vision.
   • Having astigmatism: Describes a person who suffers from this visual defect.

Usage and Examples

• Describing a condition:
  • An astigmatic eye cannot focus light properly on the retina.
  • The astigmatic lens produced a distorted image of the grid.
• Describing a person:
  • She is astigmatic and needs special corrective lenses.
  • The astigmatic patient reported improved vision with cylindrical lenses.

Advanced Usage

• Figurative Use: Can describe a perspective or analysis that is distorted or fails to see things clearly.
  • His astigmatic view of history ignored crucial social factors. (This usage is less common and more literary.)

Variants and Related Words

• Astigmatism (n): The medical or optical condition itself.
  • He was diagnosed with astigmatism.
• Astigmatically (adv): In an astigmatic manner.
  • The light was focused astigmatically.

Synonyms

• Distorted (in a general sense, not specifically medical).
• Blurred (regarding vision or image quality).

Antonyms

• Stigmatic: Relating to or having normal, single-point focus (a technical term, the direct opposite in optics).
• Emmetropic: Having normal vision where light focuses correctly on the retina.

Học thuật

Adjective

1. of or relating to a defect in the eye or in a lens caused by a deviation from spherical curvature which prevents light rays from meeting at a common focus and so results in distorted images