emmetropic

Thân thiện

A person with emmetropic vision reads a book in a sunny park.

Definition

1. Adjective:
   • Having normal vision; relating to the normal refractive condition of the eye: The term describes an eye in which light rays are focused exactly on the retina, producing clear vision without the need for corrective lenses.

Usage

• The adjective "emmetropic" is used in medical and optometric contexts to describe the ideal, standard condition of the eye's focusing power. It is the opposite of "ametropic" (having a refractive error like nearsightedness or farsightedness).
• It is typically used to modify nouns like "eye" or "vision."

Examples

• Adjective:
  • An emmetropic eye does not require glasses for distance vision.
  • The study compared visual performance in emmetropic and myopic individuals.
  • Most infants are born hyperopic but develop emmetropic vision as they grow.

Advanced Usage

• "Emmetropia" (noun): The condition of having normal refractive vision.
  • The goal of many refractive surgeries is to achieve emmetropia.
• "Emmetropization" (noun): The developmental process by which the eye grows toward emmetropia.
  • Proper emmetropization in childhood is influenced by environmental factors like time spent outdoors.

Variants and Related Words

• Emmetropia (n): The state of being emmetropic; normal refraction of the eye.
• Emmetropization (n): The process of becoming emmetropic.

Synonyms

• Normal-sighted: Having normal vision (less technical).
• Normorefractive: Having normal refraction (technical synonym).

Antonyms

• Ametropic (adj): Having a refractive error (e.g., myopic, hyperopic, astigmatic).
• Myopic (adj): Nearsighted.
• Hyperopic (adj): Farsighted.
• Astigmatic (adj): Having astigmatism.

Học thuật

Adjective

1. of or relating to the normal condition of the eye in which visual images are in clear focus on the retina