astigmatic

UK: ˌæstɪɡˈmætɪk | US: ˌæstɪɡˈmætɪk

Definition

  1. adj. relating to or affected by astigmatism (a visual defect causing blurred vision due to irregular curvature of the eye's lens or cornea).

Structure
a <without>stigmat <point>ic <adjective suffix>
Etymology

The word "astigmatic" originates from Greek roots:

  • The prefix "a-" (Greek ἀ-) means "without."
  • The root "stigmat" derives from "stigma" (στίγμα), meaning "point" or "puncture," referring to the focal point of light in the eye.
  • The suffix "-ic" turns the noun into an adjective.
    Originally used in optics, "astigmatism" describes the inability of the eye to focus light to a single point, hence "without a point." The term was later adopted into medical and optometric vocabulary in the 19th century.
Examples

  1. The optometrist diagnosed her with astigmatic vision, requiring cylindrical lenses.

  2. Astigmatic individuals often experience headaches from eye strain.

  3. His astigmatic condition made it difficult to read fine print.

  4. Modern contact lenses can correct astigmatic distortions effectively.

  5. The artist deliberately used astigmatic blurring to create a dreamlike effect in the painting.