emmetropia

/,emi'troupjə/

Thân thiện

A person with emmetropia reads a book in a well-lit room.

Definition

1. Noun:
   • The normal refractive condition of the eye: In ophthalmology, "emmetropia" refers to the ideal state of the eye where light rays from a distant object are focused precisely on the retina, resulting in clear vision without the need for corrective lenses.

Usage Examples

• Noun:
  • The optometrist confirmed that the patient had perfect emmetropia and did not require glasses.
  • Emmetropia is the standard against which refractive errors like myopia and hyperopia are measured.

Advanced Usage

• "State of emmetropia": A formal phrase describing the condition.
  • The study aimed to understand the genetic factors contributing to the state of emmetropia.

Variants and Related Words

• Emmetropic (adj): Describing an eye with emmetropia.
  • An emmetropic eye focuses light correctly on the retina.

Synonyms

• Normal vision: The common term for the visual state resulting from emmetropia.
• Perfect refraction: A technical synonym emphasizing the optical condition.

Related Terms (Contextual)

• Refractive error: The general term for conditions like myopia or hyperopia, which are deviations from emmetropia.
• Accommodation: The eye's ability to change focus, which functions optimally in an emmetropic eye for near vision.

Học thuật

Noun

1. (ophthalmology) the normal refractive condition of the eye in which there is clear focus of light on the retina