Emmetropia
Emmetropia
Emmetropia (pronounced: em-uh-TROH-pee-uh) is a term used in optometry and ophthalmology to describe the state of vision where a distant object at infinity is in sharp focus with the eye lens in a neutral or relaxed state. This condition can be contrasted with ametropia, where such focus is not achieved.
Etymology
The term "emmetropia" comes from the Greek words "en" meaning in, "metron" meaning measure, and "ops" meaning eye. Thus, it literally translates to "in measure eye", signifying a state of normal vision.
Related Terms
- Ametropia: A condition where the eye, when in a state of relaxation, does not focus the image of an object at infinity on the retina.
- Hypermetropia (or hyperopia): A condition where the eye focuses images behind the retina, often resulting in difficulty seeing close objects clearly.
- Myopia: A condition where the eye focuses images in front of the retina, often resulting in difficulty seeing distant objects clearly.
- Astigmatism: A condition where the eye does not focus light evenly onto the retina, resulting in blurred or distorted vision at all distances.
See Also
External links
- Medical encyclopedia article on Emmetropia
- Wikipedia's article - Emmetropia
This WikiMD dictionary article is a stub. You can help make it a full article.
Languages: - East Asian
中文,
日本,
한국어,
South Asian
हिन्दी,
Urdu,
বাংলা,
తెలుగు,
தமிழ்,
ಕನ್ನಡ,
Southeast Asian
Indonesian,
Vietnamese,
Thai,
မြန်မာဘာသာ,
European
español,
Deutsch,
français,
русский,
português do Brasil,
Italian,
polski