What do you mean by Emmetropia
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Answer:
Emmetropia is the term used to describe a person’s vision when absolutely no refractive error or de-focus exists. Emmetropia refers to an eye that has no visual defects. Images formed on an emmetropic eye are perfectly focused, clear and precise.
Eyes that have emmetropia do not require vision correction. When a person has emmetropia in both eyes, the person is described as having ideal vision. When an eye is emmetropic, light rays coming into the eye from a distance come to perfect focus on the retina.
If the eye is an abnormal length or the cornea is abnormally shaped, chances are you will not be emmetropic. If a person’s eye is longer than average, light may be focused in front of the retina instead of directly on it. This can cause nearsightedness. If a person’s eyeball is too short, the images are focused behind the retina. This causes farsightedness.
The general condition of emmetropia or how the eye develops toward emmetropization interests scientists and eye doctors. Knowledge of how a growing infant develops toward emmetropization will hopefully show them new ways to correct refractive errors, such as nearsightedness and farsightedness or help find ways to prevent an increase in refractive errors. The process of emmetropization is not well understood but it is thought to occur by visual input, brain activity, genetics and other mechanism where defocus can affect growth of the eye.
Emmetropia refers to an eye that has no visual defects. Images formed on an emmetropic eye are perfectly focused, clear and precise. Eyes that have emmetropia do not require vision correction. When a person has emmetropia in both eyes, the person is described as having ideal vision.